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Finding the Fourth Proportional to 96,747.20, 145,120.80 and 85,860.80

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Solution

The fourth proportional to 96,747.20, 145,120.80 and 85,860.80 is: 128,791.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,747.20 : 145,120.80 = 85,860.80 : x
  2. Step 2: Convert to fraction form
    96,747.20/145,120.80 = 85,860.80/x
  3. Step 3: Cross multiply
    96,747.20x = 145,120.80 × 85,860.80
  4. Step 4: Simplify right side
    96,747.20x = 12,460,187,984.64
  5. Step 5: Solve for x
    x = 12,460,187,984.64/96,747.20
  6. Step 6: Final answer
    x = 128,791.20

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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.