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Finding the Fourth Proportional to 169,220, 253,788.42 and 74,473.94

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Solution

The fourth proportional to 169,220, 253,788.42 and 74,473.94 is: 111,692.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,220 : 253,788.42 = 74,473.94 : x
  2. Step 2: Convert to fraction form
    169,220/253,788.42 = 74,473.94/x
  3. Step 3: Cross multiply
    169,220x = 253,788.42 × 74,473.94
  4. Step 4: Simplify right side
    169,220x = 18,900,623,563.77
  5. Step 5: Solve for x
    x = 18,900,623,563.77/169,220
  6. Step 6: Final answer
    x = 111,692.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.