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Finding the Fourth Proportional to 122,229.16, 168,360.72 and 86,356.88

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Solution

The fourth proportional to 122,229.16, 168,360.72 and 86,356.88 is: 118,949.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,229.16 : 168,360.72 = 86,356.88 : x
  2. Step 2: Convert to fraction form
    122,229.16/168,360.72 = 86,356.88/x
  3. Step 3: Cross multiply
    122,229.16x = 168,360.72 × 86,356.88
  4. Step 4: Simplify right side
    122,229.16x = 14,539,106,493.75
  5. Step 5: Solve for x
    x = 14,539,106,493.75/122,229.16
  6. Step 6: Final answer
    x = 118,949.57

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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.