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Finding the Fourth Proportional to 101,321.75, 139,814.87 and 58,289.78

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Solution

The fourth proportional to 101,321.75, 139,814.87 and 58,289.78 is: 80,434.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,321.75 : 139,814.87 = 58,289.78 : x
  2. Step 2: Convert to fraction form
    101,321.75/139,814.87 = 58,289.78/x
  3. Step 3: Cross multiply
    101,321.75x = 139,814.87 × 58,289.78
  4. Step 4: Simplify right side
    101,321.75x = 8,149,778,071.12
  5. Step 5: Solve for x
    x = 8,149,778,071.12/101,321.75
  6. Step 6: Final answer
    x = 80,434.63

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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.