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Finding the Fourth Proportional to 126,259.20, 189,388.80 and 63,921.60

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Solution

The fourth proportional to 126,259.20, 189,388.80 and 63,921.60 is: 95,882.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,259.20 : 189,388.80 = 63,921.60 : x
  2. Step 2: Convert to fraction form
    126,259.20/189,388.80 = 63,921.60/x
  3. Step 3: Cross multiply
    126,259.20x = 189,388.80 × 63,921.60
  4. Step 4: Simplify right side
    126,259.20x = 12,106,035,118.08
  5. Step 5: Solve for x
    x = 12,106,035,118.08/126,259.20
  6. Step 6: Final answer
    x = 95,882.40

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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.