Home / 138,621.36-191,297.24-78,191.82

Finding the Fourth Proportional to 138,621.36, 191,297.24 and 78,191.82

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Solution

The fourth proportional to 138,621.36, 191,297.24 and 78,191.82 is: 107,904.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,621.36 : 191,297.24 = 78,191.82 : x
  2. Step 2: Convert to fraction form
    138,621.36/191,297.24 = 78,191.82/x
  3. Step 3: Cross multiply
    138,621.36x = 191,297.24 × 78,191.82
  4. Step 4: Simplify right side
    138,621.36x = 14,957,878,965.62
  5. Step 5: Solve for x
    x = 14,957,878,965.62/138,621.36
  6. Step 6: Final answer
    x = 107,904.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.