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Finding the Fourth Proportional to 84,497.45, 126,745.83 and 21,317.72

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Solution

The fourth proportional to 84,497.45, 126,745.83 and 21,317.72 is: 31,976.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,497.45 : 126,745.83 = 21,317.72 : x
  2. Step 2: Convert to fraction form
    84,497.45/126,745.83 = 21,317.72/x
  3. Step 3: Cross multiply
    84,497.45x = 126,745.83 × 21,317.72
  4. Step 4: Simplify right side
    84,497.45x = 2,701,931,481.38
  5. Step 5: Solve for x
    x = 2,701,931,481.38/84,497.45
  6. Step 6: Final answer
    x = 31,976.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.