Home / 280,221,979,532.72-420,387,048,741-91,517,143,970.48

Finding the Fourth Proportional to 280,221,979,532.72, 420,387,048,741 and 91,517,143,970.48

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Solution

The fourth proportional to 280,221,979,532.72, 420,387,048,741 and 91,517,143,970.48 is: 137,293,377,654.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,221,979,532.72 : 420,387,048,741 = 91,517,143,970.48 : x
  2. Step 2: Convert to fraction form
    280,221,979,532.72/420,387,048,741 = 91,517,143,970.48/x
  3. Step 3: Cross multiply
    280,221,979,532.72x = 420,387,048,741 × 91,517,143,970.48
  4. Step 4: Simplify right side
    280,221,979,532.72x = 38,472,622,062,955,288,068,096
  5. Step 5: Solve for x
    x = 38,472,622,062,955,288,068,096/280,221,979,532.72
  6. Step 6: Final answer
    x = 137,293,377,654.07

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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.