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Finding the Fourth Proportional to 91,773.80, 137,660.70 and 63,780.20

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Solution

The fourth proportional to 91,773.80, 137,660.70 and 63,780.20 is: 95,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,773.80 : 137,660.70 = 63,780.20 : x
  2. Step 2: Convert to fraction form
    91,773.80/137,660.70 = 63,780.20/x
  3. Step 3: Cross multiply
    91,773.80x = 137,660.70 × 63,780.20
  4. Step 4: Simplify right side
    91,773.80x = 8,780,026,978.14
  5. Step 5: Solve for x
    x = 8,780,026,978.14/91,773.80
  6. Step 6: Final answer
    x = 95,670.30

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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.