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Finding the Fourth Proportional to 81,335.40, 122,003.10 and 50,231.40

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Solution

The fourth proportional to 81,335.40, 122,003.10 and 50,231.40 is: 75,347.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,335.40 : 122,003.10 = 50,231.40 : x
  2. Step 2: Convert to fraction form
    81,335.40/122,003.10 = 50,231.40/x
  3. Step 3: Cross multiply
    81,335.40x = 122,003.10 × 50,231.40
  4. Step 4: Simplify right side
    81,335.40x = 6,128,386,517.34
  5. Step 5: Solve for x
    x = 6,128,386,517.34/81,335.40
  6. Step 6: Final answer
    x = 75,347.10

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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.