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Finding the Fourth Proportional to 90,808.80, 136,213.20 and 40,906.32

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Solution

The fourth proportional to 90,808.80, 136,213.20 and 40,906.32 is: 61,359.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,808.80 : 136,213.20 = 40,906.32 : x
  2. Step 2: Convert to fraction form
    90,808.80/136,213.20 = 40,906.32/x
  3. Step 3: Cross multiply
    90,808.80x = 136,213.20 × 40,906.32
  4. Step 4: Simplify right side
    90,808.80x = 5,571,980,747.42
  5. Step 5: Solve for x
    x = 5,571,980,747.42/90,808.80
  6. Step 6: Final answer
    x = 61,359.48

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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.