Home / 138,447.23-191,045.59-81,078.77

Finding the Fourth Proportional to 138,447.23, 191,045.59 and 81,078.77

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Solution

The fourth proportional to 138,447.23, 191,045.59 and 81,078.77 is: 111,881.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,447.23 : 191,045.59 = 81,078.77 : x
  2. Step 2: Convert to fraction form
    138,447.23/191,045.59 = 81,078.77/x
  3. Step 3: Cross multiply
    138,447.23x = 191,045.59 × 81,078.77
  4. Step 4: Simplify right side
    138,447.23x = 15,489,741,726.04
  5. Step 5: Solve for x
    x = 15,489,741,726.04/138,447.23
  6. Step 6: Final answer
    x = 111,881.92

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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.