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Finding the Fourth Proportional to 213,385.98, 320,079.21 and 55,614.30

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Solution

The fourth proportional to 213,385.98, 320,079.21 and 55,614.30 is: 83,421.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,385.98 : 320,079.21 = 55,614.30 : x
  2. Step 2: Convert to fraction form
    213,385.98/320,079.21 = 55,614.30/x
  3. Step 3: Cross multiply
    213,385.98x = 320,079.21 × 55,614.30
  4. Step 4: Simplify right side
    213,385.98x = 17,800,981,208.70
  5. Step 5: Solve for x
    x = 17,800,981,208.70/213,385.98
  6. Step 6: Final answer
    x = 83,421.51

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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.