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Finding the Fourth Proportional to 126,087.80, 189,350.40 and 67,038.80

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Solution

The fourth proportional to 126,087.80, 189,350.40 and 67,038.80 is: 100,674.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,087.80 : 189,350.40 = 67,038.80 : x
  2. Step 2: Convert to fraction form
    126,087.80/189,350.40 = 67,038.80/x
  3. Step 3: Cross multiply
    126,087.80x = 189,350.40 × 67,038.80
  4. Step 4: Simplify right side
    126,087.80x = 12,693,823,595.52
  5. Step 5: Solve for x
    x = 12,693,823,595.52/126,087.80
  6. Step 6: Final answer
    x = 100,674.48

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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.