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Finding the Fourth Proportional to 71,510.70, 98,685.54 and 39,680.14

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Solution

The fourth proportional to 71,510.70, 98,685.54 and 39,680.14 is: 54,759.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,510.70 : 98,685.54 = 39,680.14 : x
  2. Step 2: Convert to fraction form
    71,510.70/98,685.54 = 39,680.14/x
  3. Step 3: Cross multiply
    71,510.70x = 98,685.54 × 39,680.14
  4. Step 4: Simplify right side
    71,510.70x = 3,915,856,043.18
  5. Step 5: Solve for x
    x = 3,915,856,043.18/71,510.70
  6. Step 6: Final answer
    x = 54,759.02

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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.