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Finding the Fourth Proportional to 86,388.16, 129,414.11 and 48,834.63

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Solution

The fourth proportional to 86,388.16, 129,414.11 and 48,834.63 is: 73,156.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,388.16 : 129,414.11 = 48,834.63 : x
  2. Step 2: Convert to fraction form
    86,388.16/129,414.11 = 48,834.63/x
  3. Step 3: Cross multiply
    86,388.16x = 129,414.11 × 48,834.63
  4. Step 4: Simplify right side
    86,388.16x = 6,319,890,178.63
  5. Step 5: Solve for x
    x = 6,319,890,178.63/86,388.16
  6. Step 6: Final answer
    x = 73,156.90

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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.