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Finding the Fourth Proportional to 125,411.92, 173,061.84 and 71,689.84

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Solution

The fourth proportional to 125,411.92, 173,061.84 and 71,689.84 is: 98,928.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,411.92 : 173,061.84 = 71,689.84 : x
  2. Step 2: Convert to fraction form
    125,411.92/173,061.84 = 71,689.84/x
  3. Step 3: Cross multiply
    125,411.92x = 173,061.84 × 71,689.84
  4. Step 4: Simplify right side
    125,411.92x = 12,406,775,619.71
  5. Step 5: Solve for x
    x = 12,406,775,619.71/125,411.92
  6. Step 6: Final answer
    x = 98,928.20

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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.