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Finding the Fourth Proportional to 68,659.70, 102,893.55 and 54,643.70

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Solution

The fourth proportional to 68,659.70, 102,893.55 and 54,643.70 is: 81,889.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,659.70 : 102,893.55 = 54,643.70 : x
  2. Step 2: Convert to fraction form
    68,659.70/102,893.55 = 54,643.70/x
  3. Step 3: Cross multiply
    68,659.70x = 102,893.55 × 54,643.70
  4. Step 4: Simplify right side
    68,659.70x = 5,622,484,278.14
  5. Step 5: Solve for x
    x = 5,622,484,278.14/68,659.70
  6. Step 6: Final answer
    x = 81,889.15

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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.