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Finding the Fourth Proportional to 90,839.40, 135,999.90 and 88,247.40

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Solution

The fourth proportional to 90,839.40, 135,999.90 and 88,247.40 is: 132,119.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,839.40 : 135,999.90 = 88,247.40 : x
  2. Step 2: Convert to fraction form
    90,839.40/135,999.90 = 88,247.40/x
  3. Step 3: Cross multiply
    90,839.40x = 135,999.90 × 88,247.40
  4. Step 4: Simplify right side
    90,839.40x = 12,001,637,575.26
  5. Step 5: Solve for x
    x = 12,001,637,575.26/90,839.40
  6. Step 6: Final answer
    x = 132,119.30

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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.