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Finding the Fourth Proportional to 125,772.78, 173,579.16 and 72,064.92

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Solution

The fourth proportional to 125,772.78, 173,579.16 and 72,064.92 is: 99,456.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,772.78 : 173,579.16 = 72,064.92 : x
  2. Step 2: Convert to fraction form
    125,772.78/173,579.16 = 72,064.92/x
  3. Step 3: Cross multiply
    125,772.78x = 173,579.16 × 72,064.92
  4. Step 4: Simplify right side
    125,772.78x = 12,508,968,279.07
  5. Step 5: Solve for x
    x = 12,508,968,279.07/125,772.78
  6. Step 6: Final answer
    x = 99,456.88

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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.