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Finding the Fourth Proportional to 122,978.25, 169,680.83 and 69,252.57

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Solution

The fourth proportional to 122,978.25, 169,680.83 and 69,252.57 is: 95,552.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,978.25 : 169,680.83 = 69,252.57 : x
  2. Step 2: Convert to fraction form
    122,978.25/169,680.83 = 69,252.57/x
  3. Step 3: Cross multiply
    122,978.25x = 169,680.83 × 69,252.57
  4. Step 4: Simplify right side
    122,978.25x = 11,750,833,210.97
  5. Step 5: Solve for x
    x = 11,750,833,210.97/122,978.25
  6. Step 6: Final answer
    x = 95,552.13

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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.