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Finding the Fourth Proportional to 126,088.80, 189,133.20 and 72,944.70

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Solution

The fourth proportional to 126,088.80, 189,133.20 and 72,944.70 is: 109,417.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,088.80 : 189,133.20 = 72,944.70 : x
  2. Step 2: Convert to fraction form
    126,088.80/189,133.20 = 72,944.70/x
  3. Step 3: Cross multiply
    126,088.80x = 189,133.20 × 72,944.70
  4. Step 4: Simplify right side
    126,088.80x = 13,796,264,534.04
  5. Step 5: Solve for x
    x = 13,796,264,534.04/126,088.80
  6. Step 6: Final answer
    x = 109,417.05

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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.