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Finding the Fourth Proportional to 138,993.84, 191,809.76 and 75,331.17

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Solution

The fourth proportional to 138,993.84, 191,809.76 and 75,331.17 is: 103,956.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,993.84 : 191,809.76 = 75,331.17 : x
  2. Step 2: Convert to fraction form
    138,993.84/191,809.76 = 75,331.17/x
  3. Step 3: Cross multiply
    138,993.84x = 191,809.76 × 75,331.17
  4. Step 4: Simplify right side
    138,993.84x = 14,449,253,261.56
  5. Step 5: Solve for x
    x = 14,449,253,261.56/138,993.84
  6. Step 6: Final answer
    x = 103,956.07

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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.