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Finding the Fourth Proportional to 86,572.80, 129,871.35 and 27,402.30

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Solution

The fourth proportional to 86,572.80, 129,871.35 and 27,402.30 is: 41,107.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,572.80 : 129,871.35 = 27,402.30 : x
  2. Step 2: Convert to fraction form
    86,572.80/129,871.35 = 27,402.30/x
  3. Step 3: Cross multiply
    86,572.80x = 129,871.35 × 27,402.30
  4. Step 4: Simplify right side
    86,572.80x = 3,558,773,694.11
  5. Step 5: Solve for x
    x = 3,558,773,694.11/86,572.80
  6. Step 6: Final answer
    x = 41,107.30

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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.