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Finding the Fourth Proportional to 65,731.60, 98,611.80 and 21,350.80

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Solution

The fourth proportional to 65,731.60, 98,611.80 and 21,350.80 is: 32,030.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,731.60 : 98,611.80 = 21,350.80 : x
  2. Step 2: Convert to fraction form
    65,731.60/98,611.80 = 21,350.80/x
  3. Step 3: Cross multiply
    65,731.60x = 98,611.80 × 21,350.80
  4. Step 4: Simplify right side
    65,731.60x = 2,105,440,819.44
  5. Step 5: Solve for x
    x = 2,105,440,819.44/65,731.60
  6. Step 6: Final answer
    x = 32,030.88

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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.