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Finding the Fourth Proportional to 144,830.80, 217,246.20 and 138,925.90

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Solution

The fourth proportional to 144,830.80, 217,246.20 and 138,925.90 is: 208,388.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,830.80 : 217,246.20 = 138,925.90 : x
  2. Step 2: Convert to fraction form
    144,830.80/217,246.20 = 138,925.90/x
  3. Step 3: Cross multiply
    144,830.80x = 217,246.20 × 138,925.90
  4. Step 4: Simplify right side
    144,830.80x = 30,181,123,856.58
  5. Step 5: Solve for x
    x = 30,181,123,856.58/144,830.80
  6. Step 6: Final answer
    x = 208,388.85

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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.