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Finding the Fourth Proportional to 30,154.60, 45,231.90 and 25,316.20

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Solution

The fourth proportional to 30,154.60, 45,231.90 and 25,316.20 is: 37,974.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,154.60 : 45,231.90 = 25,316.20 : x
  2. Step 2: Convert to fraction form
    30,154.60/45,231.90 = 25,316.20/x
  3. Step 3: Cross multiply
    30,154.60x = 45,231.90 × 25,316.20
  4. Step 4: Simplify right side
    30,154.60x = 1,145,099,826.78
  5. Step 5: Solve for x
    x = 1,145,099,826.78/30,154.60
  6. Step 6: Final answer
    x = 37,974.30

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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.