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Finding the Fourth Proportional to 186,103.65, 278,986.55 and 67,691.28

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Solution

The fourth proportional to 186,103.65, 278,986.55 and 67,691.28 is: 101,475.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,103.65 : 278,986.55 = 67,691.28 : x
  2. Step 2: Convert to fraction form
    186,103.65/278,986.55 = 67,691.28/x
  3. Step 3: Cross multiply
    186,103.65x = 278,986.55 × 67,691.28
  4. Step 4: Simplify right side
    186,103.65x = 18,884,956,333.83
  5. Step 5: Solve for x
    x = 18,884,956,333.83/186,103.65
  6. Step 6: Final answer
    x = 101,475.48

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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.