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Finding the Fourth Proportional to 138,265.71, 207,509.30 and 63,421.11

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Solution

The fourth proportional to 138,265.71, 207,509.30 and 63,421.11 is: 95,182.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,265.71 : 207,509.30 = 63,421.11 : x
  2. Step 2: Convert to fraction form
    138,265.71/207,509.30 = 63,421.11/x
  3. Step 3: Cross multiply
    138,265.71x = 207,509.30 × 63,421.11
  4. Step 4: Simplify right side
    138,265.71x = 13,160,469,824.22
  5. Step 5: Solve for x
    x = 13,160,469,824.22/138,265.71
  6. Step 6: Final answer
    x = 95,182.46

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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.