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Finding the Fourth Proportional to 121,138.70, 181,708.05 and 61,954.70

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Solution

The fourth proportional to 121,138.70, 181,708.05 and 61,954.70 is: 92,932.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,138.70 : 181,708.05 = 61,954.70 : x
  2. Step 2: Convert to fraction form
    121,138.70/181,708.05 = 61,954.70/x
  3. Step 3: Cross multiply
    121,138.70x = 181,708.05 × 61,954.70
  4. Step 4: Simplify right side
    121,138.70x = 11,257,667,725.34
  5. Step 5: Solve for x
    x = 11,257,667,725.34/121,138.70
  6. Step 6: Final answer
    x = 92,932.05

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1.5x scale

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.