Home / 138,693.24-191,335.77-81,303.48

Finding the Fourth Proportional to 138,693.24, 191,335.77 and 81,303.48

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Solution

The fourth proportional to 138,693.24, 191,335.77 and 81,303.48 is: 112,163.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,693.24 : 191,335.77 = 81,303.48 : x
  2. Step 2: Convert to fraction form
    138,693.24/191,335.77 = 81,303.48/x
  3. Step 3: Cross multiply
    138,693.24x = 191,335.77 × 81,303.48
  4. Step 4: Simplify right side
    138,693.24x = 15,556,263,949.48
  5. Step 5: Solve for x
    x = 15,556,263,949.48/138,693.24
  6. Step 6: Final answer
    x = 112,163.10

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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.