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Finding the Fourth Proportional to 71,601.36, 98,811.12 and 39,773.20

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Solution

The fourth proportional to 71,601.36, 98,811.12 and 39,773.20 is: 54,887.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,601.36 : 98,811.12 = 39,773.20 : x
  2. Step 2: Convert to fraction form
    71,601.36/98,811.12 = 39,773.20/x
  3. Step 3: Cross multiply
    71,601.36x = 98,811.12 × 39,773.20
  4. Step 4: Simplify right side
    71,601.36x = 3,930,034,437.98
  5. Step 5: Solve for x
    x = 3,930,034,437.98/71,601.36
  6. Step 6: Final answer
    x = 54,887.71

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1.5x scale

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.