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Finding the Fourth Proportional to 89,998.80, 134,998.20 and 85,187.40

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Solution

The fourth proportional to 89,998.80, 134,998.20 and 85,187.40 is: 127,781.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,998.80 : 134,998.20 = 85,187.40 : x
  2. Step 2: Convert to fraction form
    89,998.80/134,998.20 = 85,187.40/x
  3. Step 3: Cross multiply
    89,998.80x = 134,998.20 × 85,187.40
  4. Step 4: Simplify right side
    89,998.80x = 11,500,145,662.68
  5. Step 5: Solve for x
    x = 11,500,145,662.68/89,998.80
  6. Step 6: Final answer
    x = 127,781.10

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1.5x scale

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.