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Finding the Fourth Proportional to 61,321.80, 91,982.70 and 31,748.70

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Solution

The fourth proportional to 61,321.80, 91,982.70 and 31,748.70 is: 47,623.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,321.80 : 91,982.70 = 31,748.70 : x
  2. Step 2: Convert to fraction form
    61,321.80/91,982.70 = 31,748.70/x
  3. Step 3: Cross multiply
    61,321.80x = 91,982.70 × 31,748.70
  4. Step 4: Simplify right side
    61,321.80x = 2,920,331,147.49
  5. Step 5: Solve for x
    x = 2,920,331,147.49/61,321.80
  6. Step 6: Final answer
    x = 47,623.05

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.