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Finding the Fourth Proportional to 101,761.80, 152,642.70 and 66,332.40

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Solution

The fourth proportional to 101,761.80, 152,642.70 and 66,332.40 is: 99,498.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,761.80 : 152,642.70 = 66,332.40 : x
  2. Step 2: Convert to fraction form
    101,761.80/152,642.70 = 66,332.40/x
  3. Step 3: Cross multiply
    101,761.80x = 152,642.70 × 66,332.40
  4. Step 4: Simplify right side
    101,761.80x = 10,125,156,633.48
  5. Step 5: Solve for x
    x = 10,125,156,633.48/101,761.80
  6. Step 6: Final answer
    x = 99,498.60

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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.