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Finding the Fourth Proportional to 78,609.48, 108,480.44 and 42,799.44

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Solution

The fourth proportional to 78,609.48, 108,480.44 and 42,799.44 is: 59,062.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,609.48 : 108,480.44 = 42,799.44 : x
  2. Step 2: Convert to fraction form
    78,609.48/108,480.44 = 42,799.44/x
  3. Step 3: Cross multiply
    78,609.48x = 108,480.44 × 42,799.44
  4. Step 4: Simplify right side
    78,609.48x = 4,642,902,082.95
  5. Step 5: Solve for x
    x = 4,642,902,082.95/78,609.48
  6. Step 6: Final answer
    x = 59,062.88

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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.