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Finding the Fourth Proportional to 169,212.56, 253,812.20 and 69,348.72

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Solution

The fourth proportional to 169,212.56, 253,812.20 and 69,348.72 is: 104,020.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,212.56 : 253,812.20 = 69,348.72 : x
  2. Step 2: Convert to fraction form
    169,212.56/253,812.20 = 69,348.72/x
  3. Step 3: Cross multiply
    169,212.56x = 253,812.20 × 69,348.72
  4. Step 4: Simplify right side
    169,212.56x = 17,601,551,190.38
  5. Step 5: Solve for x
    x = 17,601,551,190.38/169,212.56
  6. Step 6: Final answer
    x = 104,020.36

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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.