Home / 138,438.29-207,511.63-71,807.69

Finding the Fourth Proportional to 138,438.29, 207,511.63 and 71,807.69

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Solution

The fourth proportional to 138,438.29, 207,511.63 and 71,807.69 is: 107,635.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,438.29 : 207,511.63 = 71,807.69 : x
  2. Step 2: Convert to fraction form
    138,438.29/207,511.63 = 71,807.69/x
  3. Step 3: Cross multiply
    138,438.29x = 207,511.63 × 71,807.69
  4. Step 4: Simplify right side
    138,438.29x = 14,900,930,798.43
  5. Step 5: Solve for x
    x = 14,900,930,798.43/138,438.29
  6. Step 6: Final answer
    x = 107,635.91

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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.