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Finding the Fourth Proportional to 66,442.86, 99,361.29 and 49,587.78

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Solution

The fourth proportional to 66,442.86, 99,361.29 and 49,587.78 is: 74,155.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,442.86 : 99,361.29 = 49,587.78 : x
  2. Step 2: Convert to fraction form
    66,442.86/99,361.29 = 49,587.78/x
  3. Step 3: Cross multiply
    66,442.86x = 99,361.29 × 49,587.78
  4. Step 4: Simplify right side
    66,442.86x = 4,927,105,789.04
  5. Step 5: Solve for x
    x = 4,927,105,789.04/66,442.86
  6. Step 6: Final answer
    x = 74,155.53

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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.