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Finding the Fourth Proportional to 91,781.65, 137,773.04 and 72,927.48

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Solution

The fourth proportional to 91,781.65, 137,773.04 and 72,927.48 is: 109,471.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,781.65 : 137,773.04 = 72,927.48 : x
  2. Step 2: Convert to fraction form
    91,781.65/137,773.04 = 72,927.48/x
  3. Step 3: Cross multiply
    91,781.65x = 137,773.04 × 72,927.48
  4. Step 4: Simplify right side
    91,781.65x = 10,047,440,619.14
  5. Step 5: Solve for x
    x = 10,047,440,619.14/91,781.65
  6. Step 6: Final answer
    x = 109,471.13

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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.