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Finding the Fourth Proportional to 159,440.76, 239,161.14 and 138,912.12

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Solution

The fourth proportional to 159,440.76, 239,161.14 and 138,912.12 is: 208,368.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,440.76 : 239,161.14 = 138,912.12 : x
  2. Step 2: Convert to fraction form
    159,440.76/239,161.14 = 138,912.12/x
  3. Step 3: Cross multiply
    159,440.76x = 239,161.14 × 138,912.12
  4. Step 4: Simplify right side
    159,440.76x = 33,222,380,979.02
  5. Step 5: Solve for x
    x = 33,222,380,979.02/159,440.76
  6. Step 6: Final answer
    x = 208,368.18

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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.