Home / 100,061.53-138,071.39-57,046.57

Finding the Fourth Proportional to 100,061.53, 138,071.39 and 57,046.57

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Solution

The fourth proportional to 100,061.53, 138,071.39 and 57,046.57 is: 78,716.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,061.53 : 138,071.39 = 57,046.57 : x
  2. Step 2: Convert to fraction form
    100,061.53/138,071.39 = 57,046.57/x
  3. Step 3: Cross multiply
    100,061.53x = 138,071.39 × 57,046.57
  4. Step 4: Simplify right side
    100,061.53x = 7,876,498,929.40
  5. Step 5: Solve for x
    x = 7,876,498,929.40/100,061.53
  6. Step 6: Final answer
    x = 78,716.55

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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.