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Finding the Fourth Proportional to 159,615.60, 239,131.80 and 129,872.40

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Solution

The fourth proportional to 159,615.60, 239,131.80 and 129,872.40 is: 194,571.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,615.60 : 239,131.80 = 129,872.40 : x
  2. Step 2: Convert to fraction form
    159,615.60/239,131.80 = 129,872.40/x
  3. Step 3: Cross multiply
    159,615.60x = 239,131.80 × 129,872.40
  4. Step 4: Simplify right side
    159,615.60x = 31,056,620,782.32
  5. Step 5: Solve for x
    x = 31,056,620,782.32/159,615.60
  6. Step 6: Final answer
    x = 194,571.34

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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.