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Finding the Fourth Proportional to 64,979.76, 97,473.12 and 20,609.88

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Solution

The fourth proportional to 64,979.76, 97,473.12 and 20,609.88 is: 30,915.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,979.76 : 97,473.12 = 20,609.88 : x
  2. Step 2: Convert to fraction form
    64,979.76/97,473.12 = 20,609.88/x
  3. Step 3: Cross multiply
    64,979.76x = 97,473.12 × 20,609.88
  4. Step 4: Simplify right side
    64,979.76x = 2,008,909,306.43
  5. Step 5: Solve for x
    x = 2,008,909,306.43/64,979.76
  6. Step 6: Final answer
    x = 30,915.92

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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.