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Finding the Fourth Proportional to 122,559.90, 169,164.63 and 74,845.50

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Solution

The fourth proportional to 122,559.90, 169,164.63 and 74,845.50 is: 103,306.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,559.90 : 169,164.63 = 74,845.50 : x
  2. Step 2: Convert to fraction form
    122,559.90/169,164.63 = 74,845.50/x
  3. Step 3: Cross multiply
    122,559.90x = 169,164.63 × 74,845.50
  4. Step 4: Simplify right side
    122,559.90x = 12,661,211,314.67
  5. Step 5: Solve for x
    x = 12,661,211,314.67/122,559.90
  6. Step 6: Final answer
    x = 103,306.31

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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.