Home / 138,248.06-190,782.75-77,819.66

Finding the Fourth Proportional to 138,248.06, 190,782.75 and 77,819.66

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Solution

The fourth proportional to 138,248.06, 190,782.75 and 77,819.66 is: 107,391.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,248.06 : 190,782.75 = 77,819.66 : x
  2. Step 2: Convert to fraction form
    138,248.06/190,782.75 = 77,819.66/x
  3. Step 3: Cross multiply
    138,248.06x = 190,782.75 × 77,819.66
  4. Step 4: Simplify right side
    138,248.06x = 14,846,647,784.95
  5. Step 5: Solve for x
    x = 14,846,647,784.95/138,248.06
  6. Step 6: Final answer
    x = 107,391.37

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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.