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Finding the Fourth Proportional to 122,549.51, 169,118.42 and 68,834.57

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Solution

The fourth proportional to 122,549.51, 169,118.42 and 68,834.57 is: 94,991.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,549.51 : 169,118.42 = 68,834.57 : x
  2. Step 2: Convert to fraction form
    122,549.51/169,118.42 = 68,834.57/x
  3. Step 3: Cross multiply
    122,549.51x = 169,118.42 × 68,834.57
  4. Step 4: Simplify right side
    122,549.51x = 11,641,193,392.85
  5. Step 5: Solve for x
    x = 11,641,193,392.85/122,549.51
  6. Step 6: Final answer
    x = 94,991.76

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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.