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Finding the Fourth Proportional to 169,242.78, 253,822.44 and 69,431.34

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Solution

The fourth proportional to 169,242.78, 253,822.44 and 69,431.34 is: 104,129.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,242.78 : 253,822.44 = 69,431.34 : x
  2. Step 2: Convert to fraction form
    169,242.78/253,822.44 = 69,431.34/x
  3. Step 3: Cross multiply
    169,242.78x = 253,822.44 × 69,431.34
  4. Step 4: Simplify right side
    169,242.78x = 17,623,232,131.27
  5. Step 5: Solve for x
    x = 17,623,232,131.27/169,242.78
  6. Step 6: Final answer
    x = 104,129.89

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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.