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Finding the Fourth Proportional to 81,610.76, 122,383.38 and 25,432.40

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Solution

The fourth proportional to 81,610.76, 122,383.38 and 25,432.40 is: 38,138.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,610.76 : 122,383.38 = 25,432.40 : x
  2. Step 2: Convert to fraction form
    81,610.76/122,383.38 = 25,432.40/x
  3. Step 3: Cross multiply
    81,610.76x = 122,383.38 × 25,432.40
  4. Step 4: Simplify right side
    81,610.76x = 3,112,503,073.51
  5. Step 5: Solve for x
    x = 3,112,503,073.51/81,610.76
  6. Step 6: Final answer
    x = 38,138.39

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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.