Home / 138,774.54-191,498.20-78,351.15

Finding the Fourth Proportional to 138,774.54, 191,498.20 and 78,351.15

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Solution

The fourth proportional to 138,774.54, 191,498.20 and 78,351.15 is: 108,118.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,774.54 : 191,498.20 = 78,351.15 : x
  2. Step 2: Convert to fraction form
    138,774.54/191,498.20 = 78,351.15/x
  3. Step 3: Cross multiply
    138,774.54x = 191,498.20 × 78,351.15
  4. Step 4: Simplify right side
    138,774.54x = 15,004,104,192.93
  5. Step 5: Solve for x
    x = 15,004,104,192.93/138,774.54
  6. Step 6: Final answer
    x = 108,118.57

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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.