Home / 138,436.82-191,125.79-90,773.30

Finding the Fourth Proportional to 138,436.82, 191,125.79 and 90,773.30

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Solution

The fourth proportional to 138,436.82, 191,125.79 and 90,773.30 is: 125,321.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,436.82 : 191,125.79 = 90,773.30 : x
  2. Step 2: Convert to fraction form
    138,436.82/191,125.79 = 90,773.30/x
  3. Step 3: Cross multiply
    138,436.82x = 191,125.79 × 90,773.30
  4. Step 4: Simplify right side
    138,436.82x = 17,349,118,673.41
  5. Step 5: Solve for x
    x = 17,349,118,673.41/138,436.82
  6. Step 6: Final answer
    x = 125,321.56

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1.5x scale

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.