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Finding the Fourth Proportional to 60,661.68, 83,660.76 and 39,433.20

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Solution

The fourth proportional to 60,661.68, 83,660.76 and 39,433.20 is: 54,383.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,661.68 : 83,660.76 = 39,433.20 : x
  2. Step 2: Convert to fraction form
    60,661.68/83,660.76 = 39,433.20/x
  3. Step 3: Cross multiply
    60,661.68x = 83,660.76 × 39,433.20
  4. Step 4: Simplify right side
    60,661.68x = 3,299,011,481.23
  5. Step 5: Solve for x
    x = 3,299,011,481.23/60,661.68
  6. Step 6: Final answer
    x = 54,383.78

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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.