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Finding the Fourth Proportional to 159,431.40, 239,175.90 and 80,346.60

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Solution

The fourth proportional to 159,431.40, 239,175.90 and 80,346.60 is: 120,534.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,431.40 : 239,175.90 = 80,346.60 : x
  2. Step 2: Convert to fraction form
    159,431.40/239,175.90 = 80,346.60/x
  3. Step 3: Cross multiply
    159,431.40x = 239,175.90 × 80,346.60
  4. Step 4: Simplify right side
    159,431.40x = 19,216,970,366.94
  5. Step 5: Solve for x
    x = 19,216,970,366.94/159,431.40
  6. Step 6: Final answer
    x = 120,534.41

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1.5x scale

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.