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Finding the Fourth Proportional to 213,870.20, 320,834.10 and 73,671.80

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Solution

The fourth proportional to 213,870.20, 320,834.10 and 73,671.80 is: 110,517.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,870.20 : 320,834.10 = 73,671.80 : x
  2. Step 2: Convert to fraction form
    213,870.20/320,834.10 = 73,671.80/x
  3. Step 3: Cross multiply
    213,870.20x = 320,834.10 × 73,671.80
  4. Step 4: Simplify right side
    213,870.20x = 23,636,425,648.38
  5. Step 5: Solve for x
    x = 23,636,425,648.38/213,870.20
  6. Step 6: Final answer
    x = 110,517.62

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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.