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Finding the Fourth Proportional to 126,259.20, 189,043.20 and 98,611.20

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Solution

The fourth proportional to 126,259.20, 189,043.20 and 98,611.20 is: 147,646.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,259.20 : 189,043.20 = 98,611.20 : x
  2. Step 2: Convert to fraction form
    126,259.20/189,043.20 = 98,611.20/x
  3. Step 3: Cross multiply
    126,259.20x = 189,043.20 × 98,611.20
  4. Step 4: Simplify right side
    126,259.20x = 18,641,776,803.84
  5. Step 5: Solve for x
    x = 18,641,776,803.84/126,259.20
  6. Step 6: Final answer
    x = 147,646.88

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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.