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Finding the Fourth Proportional to 125,446.59, 173,128.59 and 71,739.54

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Solution

The fourth proportional to 125,446.59, 173,128.59 and 71,739.54 is: 99,007.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,446.59 : 173,128.59 = 71,739.54 : x
  2. Step 2: Convert to fraction form
    125,446.59/173,128.59 = 71,739.54/x
  3. Step 3: Cross multiply
    125,446.59x = 173,128.59 × 71,739.54
  4. Step 4: Simplify right side
    125,446.59x = 12,420,165,407.45
  5. Step 5: Solve for x
    x = 12,420,165,407.45/125,446.59
  6. Step 6: Final answer
    x = 99,007.60

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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.