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Finding the Fourth Proportional to 140,243.96, 210,442.48 and 81,194.96

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Solution

The fourth proportional to 140,243.96, 210,442.48 and 81,194.96 is: 121,836.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,243.96 : 210,442.48 = 81,194.96 : x
  2. Step 2: Convert to fraction form
    140,243.96/210,442.48 = 81,194.96/x
  3. Step 3: Cross multiply
    140,243.96x = 210,442.48 × 81,194.96
  4. Step 4: Simplify right side
    140,243.96x = 17,086,868,745.90
  5. Step 5: Solve for x
    x = 17,086,868,745.90/140,243.96
  6. Step 6: Final answer
    x = 121,836.75

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1.5x scale

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.