Home / 280,221,979,531.72-420,387,048,739.50-91,517,143,969.48

Finding the Fourth Proportional to 280,221,979,531.72, 420,387,048,739.50 and 91,517,143,969.48

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Solution

The fourth proportional to 280,221,979,531.72, 420,387,048,739.50 and 91,517,143,969.48 is: 137,293,377,652.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,221,979,531.72 : 420,387,048,739.50 = 91,517,143,969.48 : x
  2. Step 2: Convert to fraction form
    280,221,979,531.72/420,387,048,739.50 = 91,517,143,969.48/x
  3. Step 3: Cross multiply
    280,221,979,531.72x = 420,387,048,739.50 × 91,517,143,969.48
  4. Step 4: Simplify right side
    280,221,979,531.72x = 38,472,622,062,397,621,796,864
  5. Step 5: Solve for x
    x = 38,472,622,062,397,621,796,864/280,221,979,531.72
  6. Step 6: Final answer
    x = 137,293,377,652.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.