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Finding the Fourth Proportional to 415,387.95, 623,081.87 and 99,844.85

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Solution

The fourth proportional to 415,387.95, 623,081.87 and 99,844.85 is: 149,767.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,387.95 : 623,081.87 = 99,844.85 : x
  2. Step 2: Convert to fraction form
    415,387.95/623,081.87 = 99,844.85/x
  3. Step 3: Cross multiply
    415,387.95x = 623,081.87 × 99,844.85
  4. Step 4: Simplify right side
    415,387.95x = 62,211,517,280.77
  5. Step 5: Solve for x
    x = 62,211,517,280.77/415,387.95
  6. Step 6: Final answer
    x = 149,767.27

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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.