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Finding the Fourth Proportional to 101,230.67, 139,695.78 and 55,288.40

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Solution

The fourth proportional to 101,230.67, 139,695.78 and 55,288.40 is: 76,296.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,230.67 : 139,695.78 = 55,288.40 : x
  2. Step 2: Convert to fraction form
    101,230.67/139,695.78 = 55,288.40/x
  3. Step 3: Cross multiply
    101,230.67x = 139,695.78 × 55,288.40
  4. Step 4: Simplify right side
    101,230.67x = 7,723,556,512.19
  5. Step 5: Solve for x
    x = 7,723,556,512.19/101,230.67
  6. Step 6: Final answer
    x = 76,296.61

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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.