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Finding the Fourth Proportional to 66,869.60, 92,279.84 and 40,013.12

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Solution

The fourth proportional to 66,869.60, 92,279.84 and 40,013.12 is: 55,217.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,869.60 : 92,279.84 = 40,013.12 : x
  2. Step 2: Convert to fraction form
    66,869.60/92,279.84 = 40,013.12/x
  3. Step 3: Cross multiply
    66,869.60x = 92,279.84 × 40,013.12
  4. Step 4: Simplify right side
    66,869.60x = 3,692,404,311.50
  5. Step 5: Solve for x
    x = 3,692,404,311.50/66,869.60
  6. Step 6: Final answer
    x = 55,217.98

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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.