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Finding the Fourth Proportional to 215,423.40, 323,135.10 and 82,235.10

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Solution

The fourth proportional to 215,423.40, 323,135.10 and 82,235.10 is: 123,352.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,423.40 : 323,135.10 = 82,235.10 : x
  2. Step 2: Convert to fraction form
    215,423.40/323,135.10 = 82,235.10/x
  3. Step 3: Cross multiply
    215,423.40x = 323,135.10 × 82,235.10
  4. Step 4: Simplify right side
    215,423.40x = 26,573,047,262.01
  5. Step 5: Solve for x
    x = 26,573,047,262.01/215,423.40
  6. Step 6: Final answer
    x = 123,352.65

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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.