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Finding the Fourth Proportional to 148,911.01, 205,515.12 and 85,247.44

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Solution

The fourth proportional to 148,911.01, 205,515.12 and 85,247.44 is: 117,651.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,911.01 : 205,515.12 = 85,247.44 : x
  2. Step 2: Convert to fraction form
    148,911.01/205,515.12 = 85,247.44/x
  3. Step 3: Cross multiply
    148,911.01x = 205,515.12 × 85,247.44
  4. Step 4: Simplify right side
    148,911.01x = 17,519,637,667.18
  5. Step 5: Solve for x
    x = 17,519,637,667.18/148,911.01
  6. Step 6: Final answer
    x = 117,651.73

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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.