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Finding the Fourth Proportional to 82,246.40, 123,369.60 and 80,934.20

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Solution

The fourth proportional to 82,246.40, 123,369.60 and 80,934.20 is: 121,401.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,246.40 : 123,369.60 = 80,934.20 : x
  2. Step 2: Convert to fraction form
    82,246.40/123,369.60 = 80,934.20/x
  3. Step 3: Cross multiply
    82,246.40x = 123,369.60 × 80,934.20
  4. Step 4: Simplify right side
    82,246.40x = 9,984,819,880.32
  5. Step 5: Solve for x
    x = 9,984,819,880.32/82,246.40
  6. Step 6: Final answer
    x = 121,401.30

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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.