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Finding the Fourth Proportional to 129,518.72, 194,200.32 and 87,839.36

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Solution

The fourth proportional to 129,518.72, 194,200.32 and 87,839.36 is: 131,706.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,518.72 : 194,200.32 = 87,839.36 : x
  2. Step 2: Convert to fraction form
    129,518.72/194,200.32 = 87,839.36/x
  3. Step 3: Cross multiply
    129,518.72x = 194,200.32 × 87,839.36
  4. Step 4: Simplify right side
    129,518.72x = 17,058,431,820.60
  5. Step 5: Solve for x
    x = 17,058,431,820.60/129,518.72
  6. Step 6: Final answer
    x = 131,706.30

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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.