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Finding the Fourth Proportional to 100,751.20, 151,399.60 and 54,037.60

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Solution

The fourth proportional to 100,751.20, 151,399.60 and 54,037.60 is: 81,202.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,751.20 : 151,399.60 = 54,037.60 : x
  2. Step 2: Convert to fraction form
    100,751.20/151,399.60 = 54,037.60/x
  3. Step 3: Cross multiply
    100,751.20x = 151,399.60 × 54,037.60
  4. Step 4: Simplify right side
    100,751.20x = 8,181,271,024.96
  5. Step 5: Solve for x
    x = 8,181,271,024.96/100,751.20
  6. Step 6: Final answer
    x = 81,202.72

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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.