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Finding the Fourth Proportional to 138,175.56, 207,111.15 and 53,920.17

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Solution

The fourth proportional to 138,175.56, 207,111.15 and 53,920.17 is: 80,820.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,175.56 : 207,111.15 = 53,920.17 : x
  2. Step 2: Convert to fraction form
    138,175.56/207,111.15 = 53,920.17/x
  3. Step 3: Cross multiply
    138,175.56x = 207,111.15 × 53,920.17
  4. Step 4: Simplify right side
    138,175.56x = 11,167,468,416.90
  5. Step 5: Solve for x
    x = 11,167,468,416.90/138,175.56
  6. Step 6: Final answer
    x = 80,820.87

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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.