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Finding the Fourth Proportional to 83,003.80, 124,631.10 and 66,314.28

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Solution

The fourth proportional to 83,003.80, 124,631.10 and 66,314.28 is: 99,571.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,003.80 : 124,631.10 = 66,314.28 : x
  2. Step 2: Convert to fraction form
    83,003.80/124,631.10 = 66,314.28/x
  3. Step 3: Cross multiply
    83,003.80x = 124,631.10 × 66,314.28
  4. Step 4: Simplify right side
    83,003.80x = 8,264,821,662.11
  5. Step 5: Solve for x
    x = 8,264,821,662.11/83,003.80
  6. Step 6: Final answer
    x = 99,571.61

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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.