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Finding the Fourth Proportional to 65,711.40, 98,542.80 and 21,339.60

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Solution

The fourth proportional to 65,711.40, 98,542.80 and 21,339.60 is: 32,001.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,711.40 : 98,542.80 = 21,339.60 : x
  2. Step 2: Convert to fraction form
    65,711.40/98,542.80 = 21,339.60/x
  3. Step 3: Cross multiply
    65,711.40x = 98,542.80 × 21,339.60
  4. Step 4: Simplify right side
    65,711.40x = 2,102,863,934.88
  5. Step 5: Solve for x
    x = 2,102,863,934.88/65,711.40
  6. Step 6: Final answer
    x = 32,001.51

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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.