Home / 156,394.38-215,820.78-84,772.56

Finding the Fourth Proportional to 156,394.38, 215,820.78 and 84,772.56

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Solution

The fourth proportional to 156,394.38, 215,820.78 and 84,772.56 is: 116,984.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,394.38 : 215,820.78 = 84,772.56 : x
  2. Step 2: Convert to fraction form
    156,394.38/215,820.78 = 84,772.56/x
  3. Step 3: Cross multiply
    156,394.38x = 215,820.78 × 84,772.56
  4. Step 4: Simplify right side
    156,394.38x = 18,295,680,021.80
  5. Step 5: Solve for x
    x = 18,295,680,021.80/156,394.38
  6. Step 6: Final answer
    x = 116,984.25

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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.