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Finding the Fourth Proportional to 80,419.80, 120,629.70 and 55,536.60

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Solution

The fourth proportional to 80,419.80, 120,629.70 and 55,536.60 is: 83,304.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,419.80 : 120,629.70 = 55,536.60 : x
  2. Step 2: Convert to fraction form
    80,419.80/120,629.70 = 55,536.60/x
  3. Step 3: Cross multiply
    80,419.80x = 120,629.70 × 55,536.60
  4. Step 4: Simplify right side
    80,419.80x = 6,699,363,397.02
  5. Step 5: Solve for x
    x = 6,699,363,397.02/80,419.80
  6. Step 6: Final answer
    x = 83,304.90

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1.5x scale

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.