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Finding the Fourth Proportional to 84,340.20, 126,510.30 and 80,452.20

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Solution

The fourth proportional to 84,340.20, 126,510.30 and 80,452.20 is: 120,678.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,340.20 : 126,510.30 = 80,452.20 : x
  2. Step 2: Convert to fraction form
    84,340.20/126,510.30 = 80,452.20/x
  3. Step 3: Cross multiply
    84,340.20x = 126,510.30 × 80,452.20
  4. Step 4: Simplify right side
    84,340.20x = 10,178,031,957.66
  5. Step 5: Solve for x
    x = 10,178,031,957.66/84,340.20
  6. Step 6: Final answer
    x = 120,678.30

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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.