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Finding the Fourth Proportional to 51,920.70, 77,881.05 and 16,863.90

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Solution

The fourth proportional to 51,920.70, 77,881.05 and 16,863.90 is: 25,295.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,920.70 : 77,881.05 = 16,863.90 : x
  2. Step 2: Convert to fraction form
    51,920.70/77,881.05 = 16,863.90/x
  3. Step 3: Cross multiply
    51,920.70x = 77,881.05 × 16,863.90
  4. Step 4: Simplify right side
    51,920.70x = 1,313,378,239.10
  5. Step 5: Solve for x
    x = 1,313,378,239.10/51,920.70
  6. Step 6: Final answer
    x = 25,295.85

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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.