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Finding the Fourth Proportional to 122,758.88, 169,347.22 and 74,929.20

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Solution

The fourth proportional to 122,758.88, 169,347.22 and 74,929.20 is: 103,365.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,758.88 : 169,347.22 = 74,929.20 : x
  2. Step 2: Convert to fraction form
    122,758.88/169,347.22 = 74,929.20/x
  3. Step 3: Cross multiply
    122,758.88x = 169,347.22 × 74,929.20
  4. Step 4: Simplify right side
    122,758.88x = 12,689,051,716.82
  5. Step 5: Solve for x
    x = 12,689,051,716.82/122,758.88
  6. Step 6: Final answer
    x = 103,365.65

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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.