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Finding the Fourth Proportional to 73,400.80, 110,101.20 and 66,949.60

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Solution

The fourth proportional to 73,400.80, 110,101.20 and 66,949.60 is: 100,424.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,400.80 : 110,101.20 = 66,949.60 : x
  2. Step 2: Convert to fraction form
    73,400.80/110,101.20 = 66,949.60/x
  3. Step 3: Cross multiply
    73,400.80x = 110,101.20 × 66,949.60
  4. Step 4: Simplify right side
    73,400.80x = 7,371,231,299.52
  5. Step 5: Solve for x
    x = 7,371,231,299.52/73,400.80
  6. Step 6: Final answer
    x = 100,424.40

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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.