Home / 100,109.93-138,138.03-59,815.13

Finding the Fourth Proportional to 100,109.93, 138,138.03 and 59,815.13

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Solution

The fourth proportional to 100,109.93, 138,138.03 and 59,815.13 is: 82,536.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,109.93 : 138,138.03 = 59,815.13 : x
  2. Step 2: Convert to fraction form
    100,109.93/138,138.03 = 59,815.13/x
  3. Step 3: Cross multiply
    100,109.93x = 138,138.03 × 59,815.13
  4. Step 4: Simplify right side
    100,109.93x = 8,262,743,531.70
  5. Step 5: Solve for x
    x = 8,262,743,531.70/100,109.93
  6. Step 6: Final answer
    x = 82,536.71

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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.