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Finding the Fourth Proportional to 125,229.18, 172,815.24 and 68,640.42

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Solution

The fourth proportional to 125,229.18, 172,815.24 and 68,640.42 is: 94,723.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,229.18 : 172,815.24 = 68,640.42 : x
  2. Step 2: Convert to fraction form
    125,229.18/172,815.24 = 68,640.42/x
  3. Step 3: Cross multiply
    125,229.18x = 172,815.24 × 68,640.42
  4. Step 4: Simplify right side
    125,229.18x = 11,862,110,656.00
  5. Step 5: Solve for x
    x = 11,862,110,656.00/125,229.18
  6. Step 6: Final answer
    x = 94,723.22

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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.