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Finding the Fourth Proportional to 71,491.51, 98,658.40 and 39,660.41

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Solution

The fourth proportional to 71,491.51, 98,658.40 and 39,660.41 is: 54,731.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,491.51 : 98,658.40 = 39,660.41 : x
  2. Step 2: Convert to fraction form
    71,491.51/98,658.40 = 39,660.41/x
  3. Step 3: Cross multiply
    71,491.51x = 98,658.40 × 39,660.41
  4. Step 4: Simplify right side
    71,491.51x = 3,912,832,470.62
  5. Step 5: Solve for x
    x = 3,912,832,470.62/71,491.51
  6. Step 6: Final answer
    x = 54,731.43

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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.