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Finding the Fourth Proportional to 90,357.36, 135,551.90 and 30,380.10

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Solution

The fourth proportional to 90,357.36, 135,551.90 and 30,380.10 is: 45,575.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,357.36 : 135,551.90 = 30,380.10 : x
  2. Step 2: Convert to fraction form
    90,357.36/135,551.90 = 30,380.10/x
  3. Step 3: Cross multiply
    90,357.36x = 135,551.90 × 30,380.10
  4. Step 4: Simplify right side
    90,357.36x = 4,118,080,353.14
  5. Step 5: Solve for x
    x = 4,118,080,353.14/90,357.36
  6. Step 6: Final answer
    x = 45,575.48

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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.