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Finding the Fourth Proportional to 91,471.80, 137,294.10 and 56,479.80

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Solution

The fourth proportional to 91,471.80, 137,294.10 and 56,479.80 is: 84,773.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,471.80 : 137,294.10 = 56,479.80 : x
  2. Step 2: Convert to fraction form
    91,471.80/137,294.10 = 56,479.80/x
  3. Step 3: Cross multiply
    91,471.80x = 137,294.10 × 56,479.80
  4. Step 4: Simplify right side
    91,471.80x = 7,754,343,309.18
  5. Step 5: Solve for x
    x = 7,754,343,309.18/91,471.80
  6. Step 6: Final answer
    x = 84,773.05

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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.