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Finding the Fourth Proportional to 91,864.80, 137,797.20 and 63,871.20

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Solution

The fourth proportional to 91,864.80, 137,797.20 and 63,871.20 is: 95,806.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,864.80 : 137,797.20 = 63,871.20 : x
  2. Step 2: Convert to fraction form
    91,864.80/137,797.20 = 63,871.20/x
  3. Step 3: Cross multiply
    91,864.80x = 137,797.20 × 63,871.20
  4. Step 4: Simplify right side
    91,864.80x = 8,801,272,520.64
  5. Step 5: Solve for x
    x = 8,801,272,520.64/91,864.80
  6. Step 6: Final answer
    x = 95,806.80

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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.