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Finding the Fourth Proportional to 98,612.80, 147,919.20 and 88,115.20

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Solution

The fourth proportional to 98,612.80, 147,919.20 and 88,115.20 is: 132,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,612.80 : 147,919.20 = 88,115.20 : x
  2. Step 2: Convert to fraction form
    98,612.80/147,919.20 = 88,115.20/x
  3. Step 3: Cross multiply
    98,612.80x = 147,919.20 × 88,115.20
  4. Step 4: Simplify right side
    98,612.80x = 13,033,929,891.84
  5. Step 5: Solve for x
    x = 13,033,929,891.84/98,612.80
  6. Step 6: Final answer
    x = 132,172.80

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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.