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Finding the Fourth Proportional to 100,420.70, 150,630.40 and 25,540.20

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Solution

The fourth proportional to 100,420.70, 150,630.40 and 25,540.20 is: 38,310.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,420.70 : 150,630.40 = 25,540.20 : x
  2. Step 2: Convert to fraction form
    100,420.70/150,630.40 = 25,540.20/x
  3. Step 3: Cross multiply
    100,420.70x = 150,630.40 × 25,540.20
  4. Step 4: Simplify right side
    100,420.70x = 3,847,130,542.08
  5. Step 5: Solve for x
    x = 3,847,130,542.08/100,420.70
  6. Step 6: Final answer
    x = 38,310.13

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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.