Home / 138,901.28-208,366.56-45,406.88

Finding the Fourth Proportional to 138,901.28, 208,366.56 and 45,406.88

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Solution

The fourth proportional to 138,901.28, 208,366.56 and 45,406.88 is: 68,115.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,901.28 : 208,366.56 = 45,406.88 : x
  2. Step 2: Convert to fraction form
    138,901.28/208,366.56 = 45,406.88/x
  3. Step 3: Cross multiply
    138,901.28x = 208,366.56 × 45,406.88
  4. Step 4: Simplify right side
    138,901.28x = 9,461,275,385.93
  5. Step 5: Solve for x
    x = 9,461,275,385.93/138,901.28
  6. Step 6: Final answer
    x = 68,115.11

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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.