Home / 138,707.29-191,355.02-81,317.44

Finding the Fourth Proportional to 138,707.29, 191,355.02 and 81,317.44

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Solution

The fourth proportional to 138,707.29, 191,355.02 and 81,317.44 is: 112,182.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,707.29 : 191,355.02 = 81,317.44 : x
  2. Step 2: Convert to fraction form
    138,707.29/191,355.02 = 81,317.44/x
  3. Step 3: Cross multiply
    138,707.29x = 191,355.02 × 81,317.44
  4. Step 4: Simplify right side
    138,707.29x = 15,560,499,400.77
  5. Step 5: Solve for x
    x = 15,560,499,400.77/138,707.29
  6. Step 6: Final answer
    x = 112,182.28

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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.