Home / 126,000.20-189,000.30-66,805.40

Finding the Fourth Proportional to 126,000.20, 189,000.30 and 66,805.40

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Solution

The fourth proportional to 126,000.20, 189,000.30 and 66,805.40 is: 100,208.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,000.20 : 189,000.30 = 66,805.40 : x
  2. Step 2: Convert to fraction form
    126,000.20/189,000.30 = 66,805.40/x
  3. Step 3: Cross multiply
    126,000.20x = 189,000.30 × 66,805.40
  4. Step 4: Simplify right side
    126,000.20x = 12,626,240,641.62
  5. Step 5: Solve for x
    x = 12,626,240,641.62/126,000.20
  6. Step 6: Final answer
    x = 100,208.10

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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.