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Finding the Fourth Proportional to 95,540.80, 143,138.40 and 77,915.20

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Solution

The fourth proportional to 95,540.80, 143,138.40 and 77,915.20 is: 116,731.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,540.80 : 143,138.40 = 77,915.20 : x
  2. Step 2: Convert to fraction form
    95,540.80/143,138.40 = 77,915.20/x
  3. Step 3: Cross multiply
    95,540.80x = 143,138.40 × 77,915.20
  4. Step 4: Simplify right side
    95,540.80x = 11,152,657,063.68
  5. Step 5: Solve for x
    x = 11,152,657,063.68/95,540.80
  6. Step 6: Final answer
    x = 116,731.88

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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.