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Finding the Fourth Proportional to 96,872.80, 133,729.92 and 64,661.20

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Solution

The fourth proportional to 96,872.80, 133,729.92 and 64,661.20 is: 89,262.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,872.80 : 133,729.92 = 64,661.20 : x
  2. Step 2: Convert to fraction form
    96,872.80/133,729.92 = 64,661.20/x
  3. Step 3: Cross multiply
    96,872.80x = 133,729.92 × 64,661.20
  4. Step 4: Simplify right side
    96,872.80x = 8,647,137,103.10
  5. Step 5: Solve for x
    x = 8,647,137,103.10/96,872.80
  6. Step 6: Final answer
    x = 89,262.80

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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.