Home / 121,956.07-168,279.28-76,601.74

Finding the Fourth Proportional to 121,956.07, 168,279.28 and 76,601.74

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Solution

The fourth proportional to 121,956.07, 168,279.28 and 76,601.74 is: 105,697.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,956.07 : 168,279.28 = 76,601.74 : x
  2. Step 2: Convert to fraction form
    121,956.07/168,279.28 = 76,601.74/x
  3. Step 3: Cross multiply
    121,956.07x = 168,279.28 × 76,601.74
  4. Step 4: Simplify right side
    121,956.07x = 12,890,485,653.95
  5. Step 5: Solve for x
    x = 12,890,485,653.95/121,956.07
  6. Step 6: Final answer
    x = 105,697.78

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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.