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Finding the Fourth Proportional to 100,865.28, 151,320.60 and 30,751.68

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Solution

The fourth proportional to 100,865.28, 151,320.60 and 30,751.68 is: 46,134.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,865.28 : 151,320.60 = 30,751.68 : x
  2. Step 2: Convert to fraction form
    100,865.28/151,320.60 = 30,751.68/x
  3. Step 3: Cross multiply
    100,865.28x = 151,320.60 × 30,751.68
  4. Step 4: Simplify right side
    100,865.28x = 4,653,362,668.61
  5. Step 5: Solve for x
    x = 4,653,362,668.61/100,865.28
  6. Step 6: Final answer
    x = 46,134.43

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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.