Home / 138,617.92-191,356.32-90,873.28

Finding the Fourth Proportional to 138,617.92, 191,356.32 and 90,873.28

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Solution

The fourth proportional to 138,617.92, 191,356.32 and 90,873.28 is: 125,446.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,617.92 : 191,356.32 = 90,873.28 : x
  2. Step 2: Convert to fraction form
    138,617.92/191,356.32 = 90,873.28/x
  3. Step 3: Cross multiply
    138,617.92x = 191,356.32 × 90,873.28
  4. Step 4: Simplify right side
    138,617.92x = 17,389,176,447.13
  5. Step 5: Solve for x
    x = 17,389,176,447.13/138,617.92
  6. Step 6: Final answer
    x = 125,446.81

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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.