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Finding the Fourth Proportional to 140,986.90, 211,480.35 and 74,401.30

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Solution

The fourth proportional to 140,986.90, 211,480.35 and 74,401.30 is: 111,601.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,986.90 : 211,480.35 = 74,401.30 : x
  2. Step 2: Convert to fraction form
    140,986.90/211,480.35 = 74,401.30/x
  3. Step 3: Cross multiply
    140,986.90x = 211,480.35 × 74,401.30
  4. Step 4: Simplify right side
    140,986.90x = 15,734,412,964.46
  5. Step 5: Solve for x
    x = 15,734,412,964.46/140,986.90
  6. Step 6: Final answer
    x = 111,601.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.