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Finding the Fourth Proportional to 79,613.80, 109,775.00 and 63,468.50

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Solution

The fourth proportional to 79,613.80, 109,775.00 and 63,468.50 is: 87,513.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,613.80 : 109,775.00 = 63,468.50 : x
  2. Step 2: Convert to fraction form
    79,613.80/109,775.00 = 63,468.50/x
  3. Step 3: Cross multiply
    79,613.80x = 109,775.00 × 63,468.50
  4. Step 4: Simplify right side
    79,613.80x = 6,967,254,197.30
  5. Step 5: Solve for x
    x = 6,967,254,197.30/79,613.80
  6. Step 6: Final answer
    x = 87,513.15

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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.