Home / 138,560.20-191,196.83-78,127.25

Finding the Fourth Proportional to 138,560.20, 191,196.83 and 78,127.25

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Solution

The fourth proportional to 138,560.20, 191,196.83 and 78,127.25 is: 107,806.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,560.20 : 191,196.83 = 78,127.25 : x
  2. Step 2: Convert to fraction form
    138,560.20/191,196.83 = 78,127.25/x
  3. Step 3: Cross multiply
    138,560.20x = 191,196.83 × 78,127.25
  4. Step 4: Simplify right side
    138,560.20x = 14,937,681,190.00
  5. Step 5: Solve for x
    x = 14,937,681,190.00/138,560.20
  6. Step 6: Final answer
    x = 107,806.43

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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.