Home / 77,856.20-107,443.69-47,640.97

Finding the Fourth Proportional to 77,856.20, 107,443.69 and 47,640.97

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Solution

The fourth proportional to 77,856.20, 107,443.69 and 47,640.97 is: 65,745.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,856.20 : 107,443.69 = 47,640.97 : x
  2. Step 2: Convert to fraction form
    77,856.20/107,443.69 = 47,640.97/x
  3. Step 3: Cross multiply
    77,856.20x = 107,443.69 × 47,640.97
  4. Step 4: Simplify right side
    77,856.20x = 5,118,721,611.98
  5. Step 5: Solve for x
    x = 5,118,721,611.98/77,856.20
  6. Step 6: Final answer
    x = 65,745.84

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1.5x scale

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.