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Finding the Fourth Proportional to 68,422.62, 102,490.86 and 55,023.12

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Solution

The fourth proportional to 68,422.62, 102,490.86 and 55,023.12 is: 82,419.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,422.62 : 102,490.86 = 55,023.12 : x
  2. Step 2: Convert to fraction form
    68,422.62/102,490.86 = 55,023.12/x
  3. Step 3: Cross multiply
    68,422.62x = 102,490.86 × 55,023.12
  4. Step 4: Simplify right side
    68,422.62x = 5,639,366,888.68
  5. Step 5: Solve for x
    x = 5,639,366,888.68/68,422.62
  6. Step 6: Final answer
    x = 82,419.63

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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.