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Finding the Fourth Proportional to 66,868.76, 92,270.04 and 40,005.92

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Solution

The fourth proportional to 66,868.76, 92,270.04 and 40,005.92 is: 55,202.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,868.76 : 92,270.04 = 40,005.92 : x
  2. Step 2: Convert to fraction form
    66,868.76/92,270.04 = 40,005.92/x
  3. Step 3: Cross multiply
    66,868.76x = 92,270.04 × 40,005.92
  4. Step 4: Simplify right side
    66,868.76x = 3,691,347,377.29
  5. Step 5: Solve for x
    x = 3,691,347,377.29/66,868.76
  6. Step 6: Final answer
    x = 55,202.87

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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.