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Finding the Fourth Proportional to 91,731.53, 126,472.32 and 59,409.03

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Solution

The fourth proportional to 91,731.53, 126,472.32 and 59,409.03 is: 81,908.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,731.53 : 126,472.32 = 59,409.03 : x
  2. Step 2: Convert to fraction form
    91,731.53/126,472.32 = 59,409.03/x
  3. Step 3: Cross multiply
    91,731.53x = 126,472.32 × 59,409.03
  4. Step 4: Simplify right side
    91,731.53x = 7,513,597,853.05
  5. Step 5: Solve for x
    x = 7,513,597,853.05/91,731.53
  6. Step 6: Final answer
    x = 81,908.56

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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.