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Finding the Fourth Proportional to 101,446.11, 139,948.47 and 65,647.68

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Solution

The fourth proportional to 101,446.11, 139,948.47 and 65,647.68 is: 90,563.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,446.11 : 139,948.47 = 65,647.68 : x
  2. Step 2: Convert to fraction form
    101,446.11/139,948.47 = 65,647.68/x
  3. Step 3: Cross multiply
    101,446.11x = 139,948.47 × 65,647.68
  4. Step 4: Simplify right side
    101,446.11x = 9,187,292,375.05
  5. Step 5: Solve for x
    x = 9,187,292,375.05/101,446.11
  6. Step 6: Final answer
    x = 90,563.28

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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.