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Finding the Fourth Proportional to 100,359.20, 150,538.80 and 74,115.20

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Solution

The fourth proportional to 100,359.20, 150,538.80 and 74,115.20 is: 111,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,359.20 : 150,538.80 = 74,115.20 : x
  2. Step 2: Convert to fraction form
    100,359.20/150,538.80 = 74,115.20/x
  3. Step 3: Cross multiply
    100,359.20x = 150,538.80 × 74,115.20
  4. Step 4: Simplify right side
    100,359.20x = 11,157,213,269.76
  5. Step 5: Solve for x
    x = 11,157,213,269.76/100,359.20
  6. Step 6: Final answer
    x = 111,172.80

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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.