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Finding the Fourth Proportional to 83,311.80, 124,773.30 and 81,641.40

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Solution

The fourth proportional to 83,311.80, 124,773.30 and 81,641.40 is: 122,271.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,311.80 : 124,773.30 = 81,641.40 : x
  2. Step 2: Convert to fraction form
    83,311.80/124,773.30 = 81,641.40/x
  3. Step 3: Cross multiply
    83,311.80x = 124,773.30 × 81,641.40
  4. Step 4: Simplify right side
    83,311.80x = 10,186,666,894.62
  5. Step 5: Solve for x
    x = 10,186,666,894.62/83,311.80
  6. Step 6: Final answer
    x = 122,271.60

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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.