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Finding the Fourth Proportional to 100,673.27, 138,926.18 and 55,351.21

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Solution

The fourth proportional to 100,673.27, 138,926.18 and 55,351.21 is: 76,383.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,673.27 : 138,926.18 = 55,351.21 : x
  2. Step 2: Convert to fraction form
    100,673.27/138,926.18 = 55,351.21/x
  3. Step 3: Cross multiply
    100,673.27x = 138,926.18 × 55,351.21
  4. Step 4: Simplify right side
    100,673.27x = 7,689,731,192.29
  5. Step 5: Solve for x
    x = 7,689,731,192.29/100,673.27
  6. Step 6: Final answer
    x = 76,383.05

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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.