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Finding the Fourth Proportional to 100,420.15, 150,629.57 and 25,539.65

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Solution

The fourth proportional to 100,420.15, 150,629.57 and 25,539.65 is: 38,309.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,420.15 : 150,629.57 = 25,539.65 : x
  2. Step 2: Convert to fraction form
    100,420.15/150,629.57 = 25,539.65/x
  3. Step 3: Cross multiply
    100,420.15x = 150,629.57 × 25,539.65
  4. Step 4: Simplify right side
    100,420.15x = 3,847,025,744.30
  5. Step 5: Solve for x
    x = 3,847,025,744.30/100,420.15
  6. Step 6: Final answer
    x = 38,309.30

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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.