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Finding the Fourth Proportional to 86,478.86, 129,687.08 and 36,562.83

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Solution

The fourth proportional to 86,478.86, 129,687.08 and 36,562.83 is: 54,831.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,478.86 : 129,687.08 = 36,562.83 : x
  2. Step 2: Convert to fraction form
    86,478.86/129,687.08 = 36,562.83/x
  3. Step 3: Cross multiply
    86,478.86x = 129,687.08 × 36,562.83
  4. Step 4: Simplify right side
    86,478.86x = 4,741,726,476.42
  5. Step 5: Solve for x
    x = 4,741,726,476.42/86,478.86
  6. Step 6: Final answer
    x = 54,831.05

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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.