Home / 120,378.74-166,078.05-77,960.66

Finding the Fourth Proportional to 120,378.74, 166,078.05 and 77,960.66

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Solution

The fourth proportional to 120,378.74, 166,078.05 and 77,960.66 is: 107,556.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,378.74 : 166,078.05 = 77,960.66 : x
  2. Step 2: Convert to fraction form
    120,378.74/166,078.05 = 77,960.66/x
  3. Step 3: Cross multiply
    120,378.74x = 166,078.05 × 77,960.66
  4. Step 4: Simplify right side
    120,378.74x = 12,947,554,389.51
  5. Step 5: Solve for x
    x = 12,947,554,389.51/120,378.74
  6. Step 6: Final answer
    x = 107,556.82

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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.