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Finding the Fourth Proportional to 86,562.80, 129,892.80 and 36,634.40

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Solution

The fourth proportional to 86,562.80, 129,892.80 and 36,634.40 is: 54,972.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,562.80 : 129,892.80 = 36,634.40 : x
  2. Step 2: Convert to fraction form
    86,562.80/129,892.80 = 36,634.40/x
  3. Step 3: Cross multiply
    86,562.80x = 129,892.80 × 36,634.40
  4. Step 4: Simplify right side
    86,562.80x = 4,758,544,792.32
  5. Step 5: Solve for x
    x = 4,758,544,792.32/86,562.80
  6. Step 6: Final answer
    x = 54,972.17

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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.