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Finding the Fourth Proportional to 82,486.76, 123,107.14 and 74,515.14

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Solution

The fourth proportional to 82,486.76, 123,107.14 and 74,515.14 is: 111,209.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,486.76 : 123,107.14 = 74,515.14 : x
  2. Step 2: Convert to fraction form
    82,486.76/123,107.14 = 74,515.14/x
  3. Step 3: Cross multiply
    82,486.76x = 123,107.14 × 74,515.14
  4. Step 4: Simplify right side
    82,486.76x = 9,173,345,865.24
  5. Step 5: Solve for x
    x = 9,173,345,865.24/82,486.76
  6. Step 6: Final answer
    x = 111,209.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.