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Finding the Fourth Proportional to 213,983.60, 320,853.90 and 80,868.20

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Solution

The fourth proportional to 213,983.60, 320,853.90 and 80,868.20 is: 121,256.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,983.60 : 320,853.90 = 80,868.20 : x
  2. Step 2: Convert to fraction form
    213,983.60/320,853.90 = 80,868.20/x
  3. Step 3: Cross multiply
    213,983.60x = 320,853.90 × 80,868.20
  4. Step 4: Simplify right side
    213,983.60x = 25,946,877,355.98
  5. Step 5: Solve for x
    x = 25,946,877,355.98/213,983.60
  6. Step 6: Final answer
    x = 121,256.38

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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.