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Finding the Fourth Proportional to 220,970.60, 331,503.90 and 80,729

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Solution

The fourth proportional to 220,970.60, 331,503.90 and 80,729 is: 121,111.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,970.60 : 331,503.90 = 80,729 : x
  2. Step 2: Convert to fraction form
    220,970.60/331,503.90 = 80,729/x
  3. Step 3: Cross multiply
    220,970.60x = 331,503.90 × 80,729
  4. Step 4: Simplify right side
    220,970.60x = 26,761,978,343.10
  5. Step 5: Solve for x
    x = 26,761,978,343.10/220,970.60
  6. Step 6: Final answer
    x = 121,111.04

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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.