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Finding the Fourth Proportional to 90,297.60, 135,440.64 and 40,381.44

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Solution

The fourth proportional to 90,297.60, 135,440.64 and 40,381.44 is: 60,569.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,297.60 : 135,440.64 = 40,381.44 : x
  2. Step 2: Convert to fraction form
    90,297.60/135,440.64 = 40,381.44/x
  3. Step 3: Cross multiply
    90,297.60x = 135,440.64 × 40,381.44
  4. Step 4: Simplify right side
    90,297.60x = 5,469,288,077.72
  5. Step 5: Solve for x
    x = 5,469,288,077.72/90,297.60
  6. Step 6: Final answer
    x = 60,569.58

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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.