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Finding the Fourth Proportional to 125,505.86, 173,199.03 and 71,787.56

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Solution

The fourth proportional to 125,505.86, 173,199.03 and 71,787.56 is: 99,067.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,505.86 : 173,199.03 = 71,787.56 : x
  2. Step 2: Convert to fraction form
    125,505.86/173,199.03 = 71,787.56/x
  3. Step 3: Cross multiply
    125,505.86x = 173,199.03 × 71,787.56
  4. Step 4: Simplify right side
    125,505.86x = 12,433,535,758.07
  5. Step 5: Solve for x
    x = 12,433,535,758.07/125,505.86
  6. Step 6: Final answer
    x = 99,067.37

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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.