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Finding the Fourth Proportional to 185,371.59, 278,079.26 and 138,919.71

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Solution

The fourth proportional to 185,371.59, 278,079.26 and 138,919.71 is: 208,395.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,371.59 : 278,079.26 = 138,919.71 : x
  2. Step 2: Convert to fraction form
    185,371.59/278,079.26 = 138,919.71/x
  3. Step 3: Cross multiply
    185,371.59x = 278,079.26 × 138,919.71
  4. Step 4: Simplify right side
    185,371.59x = 38,630,690,156.21
  5. Step 5: Solve for x
    x = 38,630,690,156.21/185,371.59
  6. Step 6: Final answer
    x = 208,395.96

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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.