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Finding the Fourth Proportional to 125,332, 172,973.52 and 72,340

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Solution

The fourth proportional to 125,332, 172,973.52 and 72,340 is: 99,838.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,332 : 172,973.52 = 72,340 : x
  2. Step 2: Convert to fraction form
    125,332/172,973.52 = 72,340/x
  3. Step 3: Cross multiply
    125,332x = 172,973.52 × 72,340
  4. Step 4: Simplify right side
    125,332x = 12,512,904,436.80
  5. Step 5: Solve for x
    x = 12,512,904,436.80/125,332
  6. Step 6: Final answer
    x = 99,838.07

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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.