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Finding the Fourth Proportional to 100,968.85, 139,372.01 and 69,242.77

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Solution

The fourth proportional to 100,968.85, 139,372.01 and 69,242.77 is: 95,579.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,968.85 : 139,372.01 = 69,242.77 : x
  2. Step 2: Convert to fraction form
    100,968.85/139,372.01 = 69,242.77/x
  3. Step 3: Cross multiply
    100,968.85x = 139,372.01 × 69,242.77
  4. Step 4: Simplify right side
    100,968.85x = 9,650,504,032.87
  5. Step 5: Solve for x
    x = 9,650,504,032.87/100,968.85
  6. Step 6: Final answer
    x = 95,579.02

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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.