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Finding the Fourth Proportional to 220,512.80, 329,991.60 and 153,639.20

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Solution

The fourth proportional to 220,512.80, 329,991.60 and 153,639.20 is: 229,917.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,512.80 : 329,991.60 = 153,639.20 : x
  2. Step 2: Convert to fraction form
    220,512.80/329,991.60 = 153,639.20/x
  3. Step 3: Cross multiply
    220,512.80x = 329,991.60 × 153,639.20
  4. Step 4: Simplify right side
    220,512.80x = 50,699,645,430.72
  5. Step 5: Solve for x
    x = 50,699,645,430.72/220,512.80
  6. Step 6: Final answer
    x = 229,917.02

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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.