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Finding the Fourth Proportional to 100,613.30, 150,919.95 and 90,115.70

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Solution

The fourth proportional to 100,613.30, 150,919.95 and 90,115.70 is: 135,173.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,613.30 : 150,919.95 = 90,115.70 : x
  2. Step 2: Convert to fraction form
    100,613.30/150,919.95 = 90,115.70/x
  3. Step 3: Cross multiply
    100,613.30x = 150,919.95 × 90,115.70
  4. Step 4: Simplify right side
    100,613.30x = 13,600,256,938.22
  5. Step 5: Solve for x
    x = 13,600,256,938.22/100,613.30
  6. Step 6: Final answer
    x = 135,173.55

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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.