Home / 78,676.09-108,571.62-42,866.36

Finding the Fourth Proportional to 78,676.09, 108,571.62 and 42,866.36

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Solution

The fourth proportional to 78,676.09, 108,571.62 and 42,866.36 is: 59,154.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,676.09 : 108,571.62 = 42,866.36 : x
  2. Step 2: Convert to fraction form
    78,676.09/108,571.62 = 42,866.36/x
  3. Step 3: Cross multiply
    78,676.09x = 108,571.62 × 42,866.36
  4. Step 4: Simplify right side
    78,676.09x = 4,654,069,605.85
  5. Step 5: Solve for x
    x = 4,654,069,605.85/78,676.09
  6. Step 6: Final answer
    x = 59,154.82

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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.