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Finding the Fourth Proportional to 61,870, 85,380.66 and 33,575.70

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Solution

The fourth proportional to 61,870, 85,380.66 and 33,575.70 is: 46,334.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,870 : 85,380.66 = 33,575.70 : x
  2. Step 2: Convert to fraction form
    61,870/85,380.66 = 33,575.70/x
  3. Step 3: Cross multiply
    61,870x = 85,380.66 × 33,575.70
  4. Step 4: Simplify right side
    61,870x = 2,866,715,425.96
  5. Step 5: Solve for x
    x = 2,866,715,425.96/61,870
  6. Step 6: Final answer
    x = 46,334.50

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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.