Home / 126,153.18-189,229.78-86,590.36

Finding the Fourth Proportional to 126,153.18, 189,229.78 and 86,590.36

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Solution

The fourth proportional to 126,153.18, 189,229.78 and 86,590.36 is: 129,885.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,153.18 : 189,229.78 = 86,590.36 : x
  2. Step 2: Convert to fraction form
    126,153.18/189,229.78 = 86,590.36/x
  3. Step 3: Cross multiply
    126,153.18x = 189,229.78 × 86,590.36
  4. Step 4: Simplify right side
    126,153.18x = 16,385,474,772.92
  5. Step 5: Solve for x
    x = 16,385,474,772.92/126,153.18
  6. Step 6: Final answer
    x = 129,885.55

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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.