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Finding the Fourth Proportional to 90,124.68, 135,219.15 and 40,200.30

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Solution

The fourth proportional to 90,124.68, 135,219.15 and 40,200.30 is: 60,314.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,124.68 : 135,219.15 = 40,200.30 : x
  2. Step 2: Convert to fraction form
    90,124.68/135,219.15 = 40,200.30/x
  3. Step 3: Cross multiply
    90,124.68x = 135,219.15 × 40,200.30
  4. Step 4: Simplify right side
    90,124.68x = 5,435,850,395.75
  5. Step 5: Solve for x
    x = 5,435,850,395.75/90,124.68
  6. Step 6: Final answer
    x = 60,314.78

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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.