Home / 78,049.78-107,618.93-57,661.37

Finding the Fourth Proportional to 78,049.78, 107,618.93 and 57,661.37

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Solution

The fourth proportional to 78,049.78, 107,618.93 and 57,661.37 is: 79,506.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,049.78 : 107,618.93 = 57,661.37 : x
  2. Step 2: Convert to fraction form
    78,049.78/107,618.93 = 57,661.37/x
  3. Step 3: Cross multiply
    78,049.78x = 107,618.93 × 57,661.37
  4. Step 4: Simplify right side
    78,049.78x = 6,205,454,735.13
  5. Step 5: Solve for x
    x = 6,205,454,735.13/78,049.78
  6. Step 6: Final answer
    x = 79,506.37

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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.