Home / 138,121.26-190,599.27-76,865.82

Finding the Fourth Proportional to 138,121.26, 190,599.27 and 76,865.82

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Solution

The fourth proportional to 138,121.26, 190,599.27 and 76,865.82 is: 106,070.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,121.26 : 190,599.27 = 76,865.82 : x
  2. Step 2: Convert to fraction form
    138,121.26/190,599.27 = 76,865.82/x
  3. Step 3: Cross multiply
    138,121.26x = 190,599.27 × 76,865.82
  4. Step 4: Simplify right side
    138,121.26x = 14,650,569,179.95
  5. Step 5: Solve for x
    x = 14,650,569,179.95/138,121.26
  6. Step 6: Final answer
    x = 106,070.34

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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.