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Finding the Fourth Proportional to 67,638.82, 93,359.29 and 38,961.78

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Solution

The fourth proportional to 67,638.82, 93,359.29 and 38,961.78 is: 53,777.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,638.82 : 93,359.29 = 38,961.78 : x
  2. Step 2: Convert to fraction form
    67,638.82/93,359.29 = 38,961.78/x
  3. Step 3: Cross multiply
    67,638.82x = 93,359.29 × 38,961.78
  4. Step 4: Simplify right side
    67,638.82x = 3,637,444,117.94
  5. Step 5: Solve for x
    x = 3,637,444,117.94/67,638.82
  6. Step 6: Final answer
    x = 53,777.46

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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.