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Finding the Fourth Proportional to 91,757.80, 137,723.10 and 56,765.80

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Solution

The fourth proportional to 91,757.80, 137,723.10 and 56,765.80 is: 85,202.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,757.80 : 137,723.10 = 56,765.80 : x
  2. Step 2: Convert to fraction form
    91,757.80/137,723.10 = 56,765.80/x
  3. Step 3: Cross multiply
    91,757.80x = 137,723.10 × 56,765.80
  4. Step 4: Simplify right side
    91,757.80x = 7,817,961,949.98
  5. Step 5: Solve for x
    x = 7,817,961,949.98/91,757.80
  6. Step 6: Final answer
    x = 85,202.15

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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.