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Finding the Fourth Proportional to 100,617.80, 150,926.70 and 90,120.20

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Solution

The fourth proportional to 100,617.80, 150,926.70 and 90,120.20 is: 135,180.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,617.80 : 150,926.70 = 90,120.20 : x
  2. Step 2: Convert to fraction form
    100,617.80/150,926.70 = 90,120.20/x
  3. Step 3: Cross multiply
    100,617.80x = 150,926.70 × 90,120.20
  4. Step 4: Simplify right side
    100,617.80x = 13,601,544,389.34
  5. Step 5: Solve for x
    x = 13,601,544,389.34/100,617.80
  6. Step 6: Final answer
    x = 135,180.30

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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.