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Finding the Fourth Proportional to 65,672.10, 98,508.15 and 18,929.70

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Solution

The fourth proportional to 65,672.10, 98,508.15 and 18,929.70 is: 28,394.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,672.10 : 98,508.15 = 18,929.70 : x
  2. Step 2: Convert to fraction form
    65,672.10/98,508.15 = 18,929.70/x
  3. Step 3: Cross multiply
    65,672.10x = 98,508.15 × 18,929.70
  4. Step 4: Simplify right side
    65,672.10x = 1,864,729,727.06
  5. Step 5: Solve for x
    x = 1,864,729,727.06/65,672.10
  6. Step 6: Final answer
    x = 28,394.55

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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.