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Finding the Fourth Proportional to 125,615.78, 173,379.57 and 71,931.61

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Solution

The fourth proportional to 125,615.78, 173,379.57 and 71,931.61 is: 99,282.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,615.78 : 173,379.57 = 71,931.61 : x
  2. Step 2: Convert to fraction form
    125,615.78/173,379.57 = 71,931.61/x
  3. Step 3: Cross multiply
    125,615.78x = 173,379.57 × 71,931.61
  4. Step 4: Simplify right side
    125,615.78x = 12,471,470,744.31
  5. Step 5: Solve for x
    x = 12,471,470,744.31/125,615.78
  6. Step 6: Final answer
    x = 99,282.68

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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.