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Finding the Fourth Proportional to 138,680.68, 208,021.56 and 33,499.48

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Solution

The fourth proportional to 138,680.68, 208,021.56 and 33,499.48 is: 50,249.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,680.68 : 208,021.56 = 33,499.48 : x
  2. Step 2: Convert to fraction form
    138,680.68/208,021.56 = 33,499.48/x
  3. Step 3: Cross multiply
    138,680.68x = 208,021.56 × 33,499.48
  4. Step 4: Simplify right side
    138,680.68x = 6,968,614,088.79
  5. Step 5: Solve for x
    x = 6,968,614,088.79/138,680.68
  6. Step 6: Final answer
    x = 50,249.35

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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.