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Finding the Fourth Proportional to 198,487.46, 297,730.74 and 86,153.12

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Solution

The fourth proportional to 198,487.46, 297,730.74 and 86,153.12 is: 129,229.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,487.46 : 297,730.74 = 86,153.12 : x
  2. Step 2: Convert to fraction form
    198,487.46/297,730.74 = 86,153.12/x
  3. Step 3: Cross multiply
    198,487.46x = 297,730.74 × 86,153.12
  4. Step 4: Simplify right side
    198,487.46x = 25,650,432,170.91
  5. Step 5: Solve for x
    x = 25,650,432,170.91/198,487.46
  6. Step 6: Final answer
    x = 129,229.48

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1.5x scale

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.