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Finding the Fourth Proportional to 161,728.80, 223,202.16 and 90,120.48

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Solution

The fourth proportional to 161,728.80, 223,202.16 and 90,120.48 is: 124,375.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,728.80 : 223,202.16 = 90,120.48 : x
  2. Step 2: Convert to fraction form
    161,728.80/223,202.16 = 90,120.48/x
  3. Step 3: Cross multiply
    161,728.80x = 223,202.16 × 90,120.48
  4. Step 4: Simplify right side
    161,728.80x = 20,115,085,796.24
  5. Step 5: Solve for x
    x = 20,115,085,796.24/161,728.80
  6. Step 6: Final answer
    x = 124,375.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.