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Finding the Fourth Proportional to 66,455.98, 99,728.92 and 49,856.65

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Solution

The fourth proportional to 66,455.98, 99,728.92 and 49,856.65 is: 74,818.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,455.98 : 99,728.92 = 49,856.65 : x
  2. Step 2: Convert to fraction form
    66,455.98/99,728.92 = 49,856.65/x
  3. Step 3: Cross multiply
    66,455.98x = 99,728.92 × 49,856.65
  4. Step 4: Simplify right side
    66,455.98x = 4,972,149,672.32
  5. Step 5: Solve for x
    x = 4,972,149,672.32/66,455.98
  6. Step 6: Final answer
    x = 74,818.70

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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.