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Finding the Fourth Proportional to 72,414.40, 108,621.60 and 30,287.20

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Solution

The fourth proportional to 72,414.40, 108,621.60 and 30,287.20 is: 45,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,414.40 : 108,621.60 = 30,287.20 : x
  2. Step 2: Convert to fraction form
    72,414.40/108,621.60 = 30,287.20/x
  3. Step 3: Cross multiply
    72,414.40x = 108,621.60 × 30,287.20
  4. Step 4: Simplify right side
    72,414.40x = 3,289,844,123.52
  5. Step 5: Solve for x
    x = 3,289,844,123.52/72,414.40
  6. Step 6: Final answer
    x = 45,430.80

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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.