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Finding the Fourth Proportional to 83,068.80, 124,603.20 and 75,811.20

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Solution

The fourth proportional to 83,068.80, 124,603.20 and 75,811.20 is: 113,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,068.80 : 124,603.20 = 75,811.20 : x
  2. Step 2: Convert to fraction form
    83,068.80/124,603.20 = 75,811.20/x
  3. Step 3: Cross multiply
    83,068.80x = 124,603.20 × 75,811.20
  4. Step 4: Simplify right side
    83,068.80x = 9,446,318,115.84
  5. Step 5: Solve for x
    x = 9,446,318,115.84/83,068.80
  6. Step 6: Final answer
    x = 113,716.80

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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.