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Finding the Fourth Proportional to 159,863.60, 239,881.80 and 71,130.80

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Solution

The fourth proportional to 159,863.60, 239,881.80 and 71,130.80 is: 106,734.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,863.60 : 239,881.80 = 71,130.80 : x
  2. Step 2: Convert to fraction form
    159,863.60/239,881.80 = 71,130.80/x
  3. Step 3: Cross multiply
    159,863.60x = 239,881.80 × 71,130.80
  4. Step 4: Simplify right side
    159,863.60x = 17,062,984,339.44
  5. Step 5: Solve for x
    x = 17,062,984,339.44/159,863.60
  6. Step 6: Final answer
    x = 106,734.64

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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.