Home / 138,581.54-191,239.86-78,151.10

Finding the Fourth Proportional to 138,581.54, 191,239.86 and 78,151.10

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Solution

The fourth proportional to 138,581.54, 191,239.86 and 78,151.10 is: 107,847.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,581.54 : 191,239.86 = 78,151.10 : x
  2. Step 2: Convert to fraction form
    138,581.54/191,239.86 = 78,151.10/x
  3. Step 3: Cross multiply
    138,581.54x = 191,239.86 × 78,151.10
  4. Step 4: Simplify right side
    138,581.54x = 14,945,605,422.85
  5. Step 5: Solve for x
    x = 14,945,605,422.85/138,581.54
  6. Step 6: Final answer
    x = 107,847.01

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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.