Home / 80,786.28-121,100.04-38,654.40

Finding the Fourth Proportional to 80,786.28, 121,100.04 and 38,654.40

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Solution

The fourth proportional to 80,786.28, 121,100.04 and 38,654.40 is: 57,943.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,786.28 : 121,100.04 = 38,654.40 : x
  2. Step 2: Convert to fraction form
    80,786.28/121,100.04 = 38,654.40/x
  3. Step 3: Cross multiply
    80,786.28x = 121,100.04 × 38,654.40
  4. Step 4: Simplify right side
    80,786.28x = 4,681,049,386.18
  5. Step 5: Solve for x
    x = 4,681,049,386.18/80,786.28
  6. Step 6: Final answer
    x = 57,943.62

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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.