Home / 100,516.67-138,706.78-55,194.47

Finding the Fourth Proportional to 100,516.67, 138,706.78 and 55,194.47

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Solution

The fourth proportional to 100,516.67, 138,706.78 and 55,194.47 is: 76,164.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,516.67 : 138,706.78 = 55,194.47 : x
  2. Step 2: Convert to fraction form
    100,516.67/138,706.78 = 55,194.47/x
  3. Step 3: Cross multiply
    100,516.67x = 138,706.78 × 55,194.47
  4. Step 4: Simplify right side
    100,516.67x = 7,655,847,207.51
  5. Step 5: Solve for x
    x = 7,655,847,207.51/100,516.67
  6. Step 6: Final answer
    x = 76,164.95

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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.