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Finding the Fourth Proportional to 220,470.80, 330,835.80 and 80,243.60

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Solution

The fourth proportional to 220,470.80, 330,835.80 and 80,243.60 is: 120,412.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,470.80 : 330,835.80 = 80,243.60 : x
  2. Step 2: Convert to fraction form
    220,470.80/330,835.80 = 80,243.60/x
  3. Step 3: Cross multiply
    220,470.80x = 330,835.80 × 80,243.60
  4. Step 4: Simplify right side
    220,470.80x = 26,547,455,600.88
  5. Step 5: Solve for x
    x = 26,547,455,600.88/220,470.80
  6. Step 6: Final answer
    x = 120,412.57

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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.