Home / 138,695.26-191,351.91-78,258.46

Finding the Fourth Proportional to 138,695.26, 191,351.91 and 78,258.46

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Solution

The fourth proportional to 138,695.26, 191,351.91 and 78,258.46 is: 107,969.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,695.26 : 191,351.91 = 78,258.46 : x
  2. Step 2: Convert to fraction form
    138,695.26/191,351.91 = 78,258.46/x
  3. Step 3: Cross multiply
    138,695.26x = 191,351.91 × 78,258.46
  4. Step 4: Simplify right side
    138,695.26x = 14,974,905,794.66
  5. Step 5: Solve for x
    x = 14,974,905,794.66/138,695.26
  6. Step 6: Final answer
    x = 107,969.85

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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.