Home / 78,279.20-107,951.70-52,789.71

Finding the Fourth Proportional to 78,279.20, 107,951.70 and 52,789.71

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Solution

The fourth proportional to 78,279.20, 107,951.70 and 52,789.71 is: 72,800.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,279.20 : 107,951.70 = 52,789.71 : x
  2. Step 2: Convert to fraction form
    78,279.20/107,951.70 = 52,789.71/x
  3. Step 3: Cross multiply
    78,279.20x = 107,951.70 × 52,789.71
  4. Step 4: Simplify right side
    78,279.20x = 5,698,738,937.01
  5. Step 5: Solve for x
    x = 5,698,738,937.01/78,279.20
  6. Step 6: Final answer
    x = 72,800.17

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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.