Home / 100,515.67-138,705.40-55,193.47

Finding the Fourth Proportional to 100,515.67, 138,705.40 and 55,193.47

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Solution

The fourth proportional to 100,515.67, 138,705.40 and 55,193.47 is: 76,163.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,515.67 : 138,705.40 = 55,193.47 : x
  2. Step 2: Convert to fraction form
    100,515.67/138,705.40 = 55,193.47/x
  3. Step 3: Cross multiply
    100,515.67x = 138,705.40 × 55,193.47
  4. Step 4: Simplify right side
    100,515.67x = 7,655,632,333.74
  5. Step 5: Solve for x
    x = 7,655,632,333.74/100,515.67
  6. Step 6: Final answer
    x = 76,163.57

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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.