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Finding the Fourth Proportional to 60,600.78, 90,905.31 and 20,603.48

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Solution

The fourth proportional to 60,600.78, 90,905.31 and 20,603.48 is: 30,906.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,600.78 : 90,905.31 = 20,603.48 : x
  2. Step 2: Convert to fraction form
    60,600.78/90,905.31 = 20,603.48/x
  3. Step 3: Cross multiply
    60,600.78x = 90,905.31 × 20,603.48
  4. Step 4: Simplify right side
    60,600.78x = 1,872,965,736.48
  5. Step 5: Solve for x
    x = 1,872,965,736.48/60,600.78
  6. Step 6: Final answer
    x = 30,906.63

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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.