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Finding the Fourth Proportional to 108,001.20, 162,001.80 and 99,471.90

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Solution

The fourth proportional to 108,001.20, 162,001.80 and 99,471.90 is: 149,207.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,001.20 : 162,001.80 = 99,471.90 : x
  2. Step 2: Convert to fraction form
    108,001.20/162,001.80 = 99,471.90/x
  3. Step 3: Cross multiply
    108,001.20x = 162,001.80 × 99,471.90
  4. Step 4: Simplify right side
    108,001.20x = 16,114,626,849.42
  5. Step 5: Solve for x
    x = 16,114,626,849.42/108,001.20
  6. Step 6: Final answer
    x = 149,207.85

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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.