Home / 90,086.40-135,129.60-88,243.20

Finding the Fourth Proportional to 90,086.40, 135,129.60 and 88,243.20

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Solution

The fourth proportional to 90,086.40, 135,129.60 and 88,243.20 is: 132,364.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,086.40 : 135,129.60 = 88,243.20 : x
  2. Step 2: Convert to fraction form
    90,086.40/135,129.60 = 88,243.20/x
  3. Step 3: Cross multiply
    90,086.40x = 135,129.60 × 88,243.20
  4. Step 4: Simplify right side
    90,086.40x = 11,924,268,318.72
  5. Step 5: Solve for x
    x = 11,924,268,318.72/90,086.40
  6. Step 6: Final answer
    x = 132,364.80

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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.