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Finding the Fourth Proportional to 90,062.60, 135,170.70 and 40,219.40

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Solution

The fourth proportional to 90,062.60, 135,170.70 and 40,219.40 is: 60,363.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,062.60 : 135,170.70 = 40,219.40 : x
  2. Step 2: Convert to fraction form
    90,062.60/135,170.70 = 40,219.40/x
  3. Step 3: Cross multiply
    90,062.60x = 135,170.70 × 40,219.40
  4. Step 4: Simplify right side
    90,062.60x = 5,436,484,451.58
  5. Step 5: Solve for x
    x = 5,436,484,451.58/90,062.60
  6. Step 6: Final answer
    x = 60,363.40

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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.