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Finding the Fourth Proportional to 90,995.60, 136,512.60 and 28,672.40

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Solution

The fourth proportional to 90,995.60, 136,512.60 and 28,672.40 is: 43,014.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,995.60 : 136,512.60 = 28,672.40 : x
  2. Step 2: Convert to fraction form
    90,995.60/136,512.60 = 28,672.40/x
  3. Step 3: Cross multiply
    90,995.60x = 136,512.60 × 28,672.40
  4. Step 4: Simplify right side
    90,995.60x = 3,914,143,872.24
  5. Step 5: Solve for x
    x = 3,914,143,872.24/90,995.60
  6. Step 6: Final answer
    x = 43,014.65

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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.