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Finding the Fourth Proportional to 122,648.46, 169,255.35 and 68,935.74

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Solution

The fourth proportional to 122,648.46, 169,255.35 and 68,935.74 is: 95,131.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,648.46 : 169,255.35 = 68,935.74 : x
  2. Step 2: Convert to fraction form
    122,648.46/169,255.35 = 68,935.74/x
  3. Step 3: Cross multiply
    122,648.46x = 169,255.35 × 68,935.74
  4. Step 4: Simplify right side
    122,648.46x = 11,667,742,801.21
  5. Step 5: Solve for x
    x = 11,667,742,801.21/122,648.46
  6. Step 6: Final answer
    x = 95,131.59

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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.