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Finding the Fourth Proportional to 90,810.90, 135,957.15 and 88,218.90

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Solution

The fourth proportional to 90,810.90, 135,957.15 and 88,218.90 is: 132,076.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,810.90 : 135,957.15 = 88,218.90 : x
  2. Step 2: Convert to fraction form
    90,810.90/135,957.15 = 88,218.90/x
  3. Step 3: Cross multiply
    90,810.90x = 135,957.15 × 88,218.90
  4. Step 4: Simplify right side
    90,810.90x = 11,993,990,220.14
  5. Step 5: Solve for x
    x = 11,993,990,220.14/90,810.90
  6. Step 6: Final answer
    x = 132,076.55

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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.