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Finding the Fourth Proportional to 64,520.40, 96,665.40 and 54,613.20

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Solution

The fourth proportional to 64,520.40, 96,665.40 and 54,613.20 is: 81,822.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,520.40 : 96,665.40 = 54,613.20 : x
  2. Step 2: Convert to fraction form
    64,520.40/96,665.40 = 54,613.20/x
  3. Step 3: Cross multiply
    64,520.40x = 96,665.40 × 54,613.20
  4. Step 4: Simplify right side
    64,520.40x = 5,279,206,823.28
  5. Step 5: Solve for x
    x = 5,279,206,823.28/64,520.40
  6. Step 6: Final answer
    x = 81,822.29

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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.