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Finding the Fourth Proportional to 125,101.55, 172,640.21 and 68,512.92

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Solution

The fourth proportional to 125,101.55, 172,640.21 and 68,512.92 is: 94,547.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,101.55 : 172,640.21 = 68,512.92 : x
  2. Step 2: Convert to fraction form
    125,101.55/172,640.21 = 68,512.92/x
  3. Step 3: Cross multiply
    125,101.55x = 172,640.21 × 68,512.92
  4. Step 4: Simplify right side
    125,101.55x = 11,828,084,553.95
  5. Step 5: Solve for x
    x = 11,828,084,553.95/125,101.55
  6. Step 6: Final answer
    x = 94,547.87

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1.5x scale

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.