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Finding the Fourth Proportional to 64,772.60, 97,162.36 and 20,402.80

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Solution

The fourth proportional to 64,772.60, 97,162.36 and 20,402.80 is: 30,605.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,772.60 : 97,162.36 = 20,402.80 : x
  2. Step 2: Convert to fraction form
    64,772.60/97,162.36 = 20,402.80/x
  3. Step 3: Cross multiply
    64,772.60x = 97,162.36 × 20,402.80
  4. Step 4: Simplify right side
    64,772.60x = 1,982,384,198.61
  5. Step 5: Solve for x
    x = 1,982,384,198.61/64,772.60
  6. Step 6: Final answer
    x = 30,605.29

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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.