Home / 138,747.95-191,480.78-78,296.54

Finding the Fourth Proportional to 138,747.95, 191,480.78 and 78,296.54

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Solution

The fourth proportional to 138,747.95, 191,480.78 and 78,296.54 is: 108,054.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,747.95 : 191,480.78 = 78,296.54 : x
  2. Step 2: Convert to fraction form
    138,747.95/191,480.78 = 78,296.54/x
  3. Step 3: Cross multiply
    138,747.95x = 191,480.78 × 78,296.54
  4. Step 4: Simplify right side
    138,747.95x = 14,992,281,788.84
  5. Step 5: Solve for x
    x = 14,992,281,788.84/138,747.95
  6. Step 6: Final answer
    x = 108,054.08

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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.