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Finding the Fourth Proportional to 101,029.74, 139,422 and 55,709.52

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Solution

The fourth proportional to 101,029.74, 139,422 and 55,709.52 is: 76,879.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,029.74 : 139,422 = 55,709.52 : x
  2. Step 2: Convert to fraction form
    101,029.74/139,422 = 55,709.52/x
  3. Step 3: Cross multiply
    101,029.74x = 139,422 × 55,709.52
  4. Step 4: Simplify right side
    101,029.74x = 7,767,132,697.44
  5. Step 5: Solve for x
    x = 7,767,132,697.44/101,029.74
  6. Step 6: Final answer
    x = 76,879.67

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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.