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Finding the Fourth Proportional to 189,397.52, 261,359.70 and 108,768.20

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Solution

The fourth proportional to 189,397.52, 261,359.70 and 108,768.20 is: 150,095.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,397.52 : 261,359.70 = 108,768.20 : x
  2. Step 2: Convert to fraction form
    189,397.52/261,359.70 = 108,768.20/x
  3. Step 3: Cross multiply
    189,397.52x = 261,359.70 × 108,768.20
  4. Step 4: Simplify right side
    189,397.52x = 28,427,624,121.54
  5. Step 5: Solve for x
    x = 28,427,624,121.54/189,397.52
  6. Step 6: Final answer
    x = 150,095.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.