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Finding the Fourth Proportional to 85,191.74, 127,692.03 and 28,979.36

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Solution

The fourth proportional to 85,191.74, 127,692.03 and 28,979.36 is: 43,436.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,191.74 : 127,692.03 = 28,979.36 : x
  2. Step 2: Convert to fraction form
    85,191.74/127,692.03 = 28,979.36/x
  3. Step 3: Cross multiply
    85,191.74x = 127,692.03 × 28,979.36
  4. Step 4: Simplify right side
    85,191.74x = 3,700,433,306.50
  5. Step 5: Solve for x
    x = 3,700,433,306.50/85,191.74
  6. Step 6: Final answer
    x = 43,436.53

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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.