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Finding the Fourth Proportional to 91,108.27, 136,701.87 and 48,939.15

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Solution

The fourth proportional to 91,108.27, 136,701.87 and 48,939.15 is: 73,429.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,108.27 : 136,701.87 = 48,939.15 : x
  2. Step 2: Convert to fraction form
    91,108.27/136,701.87 = 48,939.15/x
  3. Step 3: Cross multiply
    91,108.27x = 136,701.87 × 48,939.15
  4. Step 4: Simplify right side
    91,108.27x = 6,690,073,417.71
  5. Step 5: Solve for x
    x = 6,690,073,417.71/91,108.27
  6. Step 6: Final answer
    x = 73,429.93

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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.