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Finding the Fourth Proportional to 125,407.52, 188,110.78 and 45,426.78

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Solution

The fourth proportional to 125,407.52, 188,110.78 and 45,426.78 is: 68,139.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,407.52 : 188,110.78 = 45,426.78 : x
  2. Step 2: Convert to fraction form
    125,407.52/188,110.78 = 45,426.78/x
  3. Step 3: Cross multiply
    125,407.52x = 188,110.78 × 45,426.78
  4. Step 4: Simplify right side
    125,407.52x = 8,545,267,561.95
  5. Step 5: Solve for x
    x = 8,545,267,561.95/125,407.52
  6. Step 6: Final answer
    x = 68,139.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.