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Finding the Fourth Proportional to 101,291.67, 139,781.97 and 55,972.78

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Solution

The fourth proportional to 101,291.67, 139,781.97 and 55,972.78 is: 77,242.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,291.67 : 139,781.97 = 55,972.78 : x
  2. Step 2: Convert to fraction form
    101,291.67/139,781.97 = 55,972.78/x
  3. Step 3: Cross multiply
    101,291.67x = 139,781.97 × 55,972.78
  4. Step 4: Simplify right side
    101,291.67x = 7,823,985,105.32
  5. Step 5: Solve for x
    x = 7,823,985,105.32/101,291.67
  6. Step 6: Final answer
    x = 77,242.14

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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.