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Finding the Fourth Proportional to 64,890.43, 97,335.03 and 20,517.19

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Solution

The fourth proportional to 64,890.43, 97,335.03 and 20,517.19 is: 30,775.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,890.43 : 97,335.03 = 20,517.19 : x
  2. Step 2: Convert to fraction form
    64,890.43/97,335.03 = 20,517.19/x
  3. Step 3: Cross multiply
    64,890.43x = 97,335.03 × 20,517.19
  4. Step 4: Simplify right side
    64,890.43x = 1,997,041,304.17
  5. Step 5: Solve for x
    x = 1,997,041,304.17/64,890.43
  6. Step 6: Final answer
    x = 30,775.59

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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.