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Finding the Fourth Proportional to 121,138.28, 167,027.76 and 82,916.28

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Solution

The fourth proportional to 121,138.28, 167,027.76 and 82,916.28 is: 114,326.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,138.28 : 167,027.76 = 82,916.28 : x
  2. Step 2: Convert to fraction form
    121,138.28/167,027.76 = 82,916.28/x
  3. Step 3: Cross multiply
    121,138.28x = 167,027.76 × 82,916.28
  4. Step 4: Simplify right side
    121,138.28x = 13,849,320,515.93
  5. Step 5: Solve for x
    x = 13,849,320,515.93/121,138.28
  6. Step 6: Final answer
    x = 114,326.54

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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.