Home / 138,809.81-191,589.16-90,326.29

Finding the Fourth Proportional to 138,809.81, 191,589.16 and 90,326.29

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Solution

The fourth proportional to 138,809.81, 191,589.16 and 90,326.29 is: 124,670.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,809.81 : 191,589.16 = 90,326.29 : x
  2. Step 2: Convert to fraction form
    138,809.81/191,589.16 = 90,326.29/x
  3. Step 3: Cross multiply
    138,809.81x = 191,589.16 × 90,326.29
  4. Step 4: Simplify right side
    138,809.81x = 17,305,538,027.02
  5. Step 5: Solve for x
    x = 17,305,538,027.02/138,809.81
  6. Step 6: Final answer
    x = 124,670.86

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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.