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Finding the Fourth Proportional to 79,501.80, 109,711.78 and 43,692.20

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Solution

The fourth proportional to 79,501.80, 109,711.78 and 43,692.20 is: 60,294.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,501.80 : 109,711.78 = 43,692.20 : x
  2. Step 2: Convert to fraction form
    79,501.80/109,711.78 = 43,692.20/x
  3. Step 3: Cross multiply
    79,501.80x = 109,711.78 × 43,692.20
  4. Step 4: Simplify right side
    79,501.80x = 4,793,549,034.12
  5. Step 5: Solve for x
    x = 4,793,549,034.12/79,501.80
  6. Step 6: Final answer
    x = 60,294.85

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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.