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Finding the Fourth Proportional to 125,894.88, 173,728.16 and 72,177.28

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Solution

The fourth proportional to 125,894.88, 173,728.16 and 72,177.28 is: 99,600.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,894.88 : 173,728.16 = 72,177.28 : x
  2. Step 2: Convert to fraction form
    125,894.88/173,728.16 = 72,177.28/x
  3. Step 3: Cross multiply
    125,894.88x = 173,728.16 × 72,177.28
  4. Step 4: Simplify right side
    125,894.88x = 12,539,226,048.20
  5. Step 5: Solve for x
    x = 12,539,226,048.20/125,894.88
  6. Step 6: Final answer
    x = 99,600.76

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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.