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Finding the Fourth Proportional to 101,129.55, 139,506.67 and 62,874.60

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Solution

The fourth proportional to 101,129.55, 139,506.67 and 62,874.60 is: 86,734.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,129.55 : 139,506.67 = 62,874.60 : x
  2. Step 2: Convert to fraction form
    101,129.55/139,506.67 = 62,874.60/x
  3. Step 3: Cross multiply
    101,129.55x = 139,506.67 × 62,874.60
  4. Step 4: Simplify right side
    101,129.55x = 8,771,425,452.19
  5. Step 5: Solve for x
    x = 8,771,425,452.19/101,129.55
  6. Step 6: Final answer
    x = 86,734.54

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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.