Home / 138,333.83-190,898.78-77,910.46

Finding the Fourth Proportional to 138,333.83, 190,898.78 and 77,910.46

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Solution

The fourth proportional to 138,333.83, 190,898.78 and 77,910.46 is: 107,515.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,333.83 : 190,898.78 = 77,910.46 : x
  2. Step 2: Convert to fraction form
    138,333.83/190,898.78 = 77,910.46/x
  3. Step 3: Cross multiply
    138,333.83x = 190,898.78 × 77,910.46
  4. Step 4: Simplify right side
    138,333.83x = 14,873,010,896.44
  5. Step 5: Solve for x
    x = 14,873,010,896.44/138,333.83
  6. Step 6: Final answer
    x = 107,515.36

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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.