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Finding the Fourth Proportional to 66,847.64, 92,248.62 and 39,974.87

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Solution

The fourth proportional to 66,847.64, 92,248.62 and 39,974.87 is: 55,164.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,847.64 : 92,248.62 = 39,974.87 : x
  2. Step 2: Convert to fraction form
    66,847.64/92,248.62 = 39,974.87/x
  3. Step 3: Cross multiply
    66,847.64x = 92,248.62 × 39,974.87
  4. Step 4: Simplify right side
    66,847.64x = 3,687,626,130.94
  5. Step 5: Solve for x
    x = 3,687,626,130.94/66,847.64
  6. Step 6: Final answer
    x = 55,164.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.