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Finding the Fourth Proportional to 82,403.40, 123,605.10 and 51,299.40

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Solution

The fourth proportional to 82,403.40, 123,605.10 and 51,299.40 is: 76,949.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,403.40 : 123,605.10 = 51,299.40 : x
  2. Step 2: Convert to fraction form
    82,403.40/123,605.10 = 51,299.40/x
  3. Step 3: Cross multiply
    82,403.40x = 123,605.10 × 51,299.40
  4. Step 4: Simplify right side
    82,403.40x = 6,340,867,466.94
  5. Step 5: Solve for x
    x = 6,340,867,466.94/82,403.40
  6. Step 6: Final answer
    x = 76,949.10

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Double scale
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Similar ratio
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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.