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Finding the Fourth Proportional to 66,911.74, 92,311.85 and 38,611.96

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Solution

The fourth proportional to 66,911.74, 92,311.85 and 38,611.96 is: 53,269.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,911.74 : 92,311.85 = 38,611.96 : x
  2. Step 2: Convert to fraction form
    66,911.74/92,311.85 = 38,611.96/x
  3. Step 3: Cross multiply
    66,911.74x = 92,311.85 × 38,611.96
  4. Step 4: Simplify right side
    66,911.74x = 3,564,341,459.73
  5. Step 5: Solve for x
    x = 3,564,341,459.73/66,911.74
  6. Step 6: Final answer
    x = 53,269.30

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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.