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Finding the Fourth Proportional to 103,690.80, 155,579.85 and 61,651.17

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Solution

The fourth proportional to 103,690.80, 155,579.85 and 61,651.17 is: 92,502.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,690.80 : 155,579.85 = 61,651.17 : x
  2. Step 2: Convert to fraction form
    103,690.80/155,579.85 = 61,651.17/x
  3. Step 3: Cross multiply
    103,690.80x = 155,579.85 × 61,651.17
  4. Step 4: Simplify right side
    103,690.80x = 9,591,679,780.92
  5. Step 5: Solve for x
    x = 9,591,679,780.92/103,690.80
  6. Step 6: Final answer
    x = 92,502.71

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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.