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Finding the Fourth Proportional to 122,129.74, 168,454.89 and 85,908.02

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Solution

The fourth proportional to 122,129.74, 168,454.89 and 85,908.02 is: 118,493.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,129.74 : 168,454.89 = 85,908.02 : x
  2. Step 2: Convert to fraction form
    122,129.74/168,454.89 = 85,908.02/x
  3. Step 3: Cross multiply
    122,129.74x = 168,454.89 × 85,908.02
  4. Step 4: Simplify right side
    122,129.74x = 14,471,626,059.22
  5. Step 5: Solve for x
    x = 14,471,626,059.22/122,129.74
  6. Step 6: Final answer
    x = 118,493.87

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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.