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Finding the Fourth Proportional to 132,401.40, 198,602.10 and 85,162.20

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Solution

The fourth proportional to 132,401.40, 198,602.10 and 85,162.20 is: 127,743.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,401.40 : 198,602.10 = 85,162.20 : x
  2. Step 2: Convert to fraction form
    132,401.40/198,602.10 = 85,162.20/x
  3. Step 3: Cross multiply
    132,401.40x = 198,602.10 × 85,162.20
  4. Step 4: Simplify right side
    132,401.40x = 16,913,391,760.62
  5. Step 5: Solve for x
    x = 16,913,391,760.62/132,401.40
  6. Step 6: Final answer
    x = 127,743.30

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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.