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Finding the Fourth Proportional to 68,775.90, 103,397.13 and 54,913.02

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Solution

The fourth proportional to 68,775.90, 103,397.13 and 54,913.02 is: 82,555.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,775.90 : 103,397.13 = 54,913.02 : x
  2. Step 2: Convert to fraction form
    68,775.90/103,397.13 = 54,913.02/x
  3. Step 3: Cross multiply
    68,775.90x = 103,397.13 × 54,913.02
  4. Step 4: Simplify right side
    68,775.90x = 5,677,848,667.63
  5. Step 5: Solve for x
    x = 5,677,848,667.63/68,775.90
  6. Step 6: Final answer
    x = 82,555.79

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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.