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Finding the Fourth Proportional to 220,852.40, 331,278.60 and 121,319.60

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Solution

The fourth proportional to 220,852.40, 331,278.60 and 121,319.60 is: 181,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,852.40 : 331,278.60 = 121,319.60 : x
  2. Step 2: Convert to fraction form
    220,852.40/331,278.60 = 121,319.60/x
  3. Step 3: Cross multiply
    220,852.40x = 331,278.60 × 121,319.60
  4. Step 4: Simplify right side
    220,852.40x = 40,190,587,240.56
  5. Step 5: Solve for x
    x = 40,190,587,240.56/220,852.40
  6. Step 6: Final answer
    x = 181,979.40

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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.