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Finding the Fourth Proportional to 113,726.42, 170,737.45 and 87,449.61

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Solution

The fourth proportional to 113,726.42, 170,737.45 and 87,449.61 is: 131,288.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,726.42 : 170,737.45 = 87,449.61 : x
  2. Step 2: Convert to fraction form
    113,726.42/170,737.45 = 87,449.61/x
  3. Step 3: Cross multiply
    113,726.42x = 170,737.45 × 87,449.61
  4. Step 4: Simplify right side
    113,726.42x = 14,930,923,196.27
  5. Step 5: Solve for x
    x = 14,930,923,196.27/113,726.42
  6. Step 6: Final answer
    x = 131,288.08

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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.