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Finding the Fourth Proportional to 86,530.60, 129,820.20 and 36,634.60

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Solution

The fourth proportional to 86,530.60, 129,820.20 and 36,634.60 is: 54,962.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,530.60 : 129,820.20 = 36,634.60 : x
  2. Step 2: Convert to fraction form
    86,530.60/129,820.20 = 36,634.60/x
  3. Step 3: Cross multiply
    86,530.60x = 129,820.20 × 36,634.60
  4. Step 4: Simplify right side
    86,530.60x = 4,755,911,098.92
  5. Step 5: Solve for x
    x = 4,755,911,098.92/86,530.60
  6. Step 6: Final answer
    x = 54,962.19

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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.