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Finding the Fourth Proportional to 60,865.92, 84,009 and 39,608.28

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Solution

The fourth proportional to 60,865.92, 84,009 and 39,608.28 is: 54,668.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,865.92 : 84,009 = 39,608.28 : x
  2. Step 2: Convert to fraction form
    60,865.92/84,009 = 39,608.28/x
  3. Step 3: Cross multiply
    60,865.92x = 84,009 × 39,608.28
  4. Step 4: Simplify right side
    60,865.92x = 3,327,451,994.52
  5. Step 5: Solve for x
    x = 3,327,451,994.52/60,865.92
  6. Step 6: Final answer
    x = 54,668.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.