Home / 100,510.38-138,706.97-55,191.29

Finding the Fourth Proportional to 100,510.38, 138,706.97 and 55,191.29

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Solution

The fourth proportional to 100,510.38, 138,706.97 and 55,191.29 is: 76,165.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,510.38 : 138,706.97 = 55,191.29 : x
  2. Step 2: Convert to fraction form
    100,510.38/138,706.97 = 55,191.29/x
  3. Step 3: Cross multiply
    100,510.38x = 138,706.97 × 55,191.29
  4. Step 4: Simplify right side
    100,510.38x = 7,655,415,636.80
  5. Step 5: Solve for x
    x = 7,655,415,636.80/100,510.38
  6. Step 6: Final answer
    x = 76,165.42

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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.