Home / 138,727.67-191,444.84-78,300.86

Finding the Fourth Proportional to 138,727.67, 191,444.84 and 78,300.86

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Solution

The fourth proportional to 138,727.67, 191,444.84 and 78,300.86 is: 108,055.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,727.67 : 191,444.84 = 78,300.86 : x
  2. Step 2: Convert to fraction form
    138,727.67/191,444.84 = 78,300.86/x
  3. Step 3: Cross multiply
    138,727.67x = 191,444.84 × 78,300.86
  4. Step 4: Simplify right side
    138,727.67x = 14,990,295,856.56
  5. Step 5: Solve for x
    x = 14,990,295,856.56/138,727.67
  6. Step 6: Final answer
    x = 108,055.56

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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.