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Finding the Fourth Proportional to 67,216.70, 100,801.55 and 19,819.22

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Solution

The fourth proportional to 67,216.70, 100,801.55 and 19,819.22 is: 29,721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,216.70 : 100,801.55 = 19,819.22 : x
  2. Step 2: Convert to fraction form
    67,216.70/100,801.55 = 19,819.22/x
  3. Step 3: Cross multiply
    67,216.70x = 100,801.55 × 19,819.22
  4. Step 4: Simplify right side
    67,216.70x = 1,997,807,641.33
  5. Step 5: Solve for x
    x = 1,997,807,641.33/67,216.70
  6. Step 6: Final answer
    x = 29,721.89

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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.