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Finding the Fourth Proportional to 122,751.46, 169,339.80 and 79,727.89

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Solution

The fourth proportional to 122,751.46, 169,339.80 and 79,727.89 is: 109,987.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,751.46 : 169,339.80 = 79,727.89 : x
  2. Step 2: Convert to fraction form
    122,751.46/169,339.80 = 79,727.89/x
  3. Step 3: Cross multiply
    122,751.46x = 169,339.80 × 79,727.89
  4. Step 4: Simplify right side
    122,751.46x = 13,501,104,947.02
  5. Step 5: Solve for x
    x = 13,501,104,947.02/122,751.46
  6. Step 6: Final answer
    x = 109,987.33

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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.