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Finding the Fourth Proportional to 71,510.99, 98,684.85 and 39,679.82

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Solution

The fourth proportional to 71,510.99, 98,684.85 and 39,679.82 is: 54,757.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,510.99 : 98,684.85 = 39,679.82 : x
  2. Step 2: Convert to fraction form
    71,510.99/98,684.85 = 39,679.82/x
  3. Step 3: Cross multiply
    71,510.99x = 98,684.85 × 39,679.82
  4. Step 4: Simplify right side
    71,510.99x = 3,915,796,591.30
  5. Step 5: Solve for x
    x = 3,915,796,591.30/71,510.99
  6. Step 6: Final answer
    x = 54,757.97

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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.