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Finding the Fourth Proportional to 90,400.60, 135,576.60 and 37,799.20

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Solution

The fourth proportional to 90,400.60, 135,576.60 and 37,799.20 is: 56,688.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,400.60 : 135,576.60 = 37,799.20 : x
  2. Step 2: Convert to fraction form
    90,400.60/135,576.60 = 37,799.20/x
  3. Step 3: Cross multiply
    90,400.60x = 135,576.60 × 37,799.20
  4. Step 4: Simplify right side
    90,400.60x = 5,124,687,018.72
  5. Step 5: Solve for x
    x = 5,124,687,018.72/90,400.60
  6. Step 6: Final answer
    x = 56,688.64

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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.