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Finding the Fourth Proportional to 213,579.55, 320,335.70 and 71,423.73

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Solution

The fourth proportional to 213,579.55, 320,335.70 and 71,423.73 is: 107,124.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,579.55 : 320,335.70 = 71,423.73 : x
  2. Step 2: Convert to fraction form
    213,579.55/320,335.70 = 71,423.73/x
  3. Step 3: Cross multiply
    213,579.55x = 320,335.70 × 71,423.73
  4. Step 4: Simplify right side
    213,579.55x = 22,879,570,189.04
  5. Step 5: Solve for x
    x = 22,879,570,189.04/213,579.55
  6. Step 6: Final answer
    x = 107,124.35

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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.