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Finding the Fourth Proportional to 121,447.80, 182,139.30 and 42,553.80

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Solution

The fourth proportional to 121,447.80, 182,139.30 and 42,553.80 is: 63,819.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,447.80 : 182,139.30 = 42,553.80 : x
  2. Step 2: Convert to fraction form
    121,447.80/182,139.30 = 42,553.80/x
  3. Step 3: Cross multiply
    121,447.80x = 182,139.30 × 42,553.80
  4. Step 4: Simplify right side
    121,447.80x = 7,750,719,344.34
  5. Step 5: Solve for x
    x = 7,750,719,344.34/121,447.80
  6. Step 6: Final answer
    x = 63,819.35

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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.