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Finding the Fourth Proportional to 101,122.57, 139,543.69 and 55,791.67

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Solution

The fourth proportional to 101,122.57, 139,543.69 and 55,791.67 is: 76,989.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,122.57 : 139,543.69 = 55,791.67 : x
  2. Step 2: Convert to fraction form
    101,122.57/139,543.69 = 55,791.67/x
  3. Step 3: Cross multiply
    101,122.57x = 139,543.69 × 55,791.67
  4. Step 4: Simplify right side
    101,122.57x = 7,785,375,503.06
  5. Step 5: Solve for x
    x = 7,785,375,503.06/101,122.57
  6. Step 6: Final answer
    x = 76,989.49

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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.