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Finding the Fourth Proportional to 124,970, 172,462.32 and 68,385.20

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Solution

The fourth proportional to 124,970, 172,462.32 and 68,385.20 is: 94,373.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,970 : 172,462.32 = 68,385.20 : x
  2. Step 2: Convert to fraction form
    124,970/172,462.32 = 68,385.20/x
  3. Step 3: Cross multiply
    124,970x = 172,462.32 × 68,385.20
  4. Step 4: Simplify right side
    124,970x = 11,793,870,245.66
  5. Step 5: Solve for x
    x = 11,793,870,245.66/124,970
  6. Step 6: Final answer
    x = 94,373.61

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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.