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Finding the Fourth Proportional to 68,289.20, 102,337.80 and 54,273.20

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Solution

The fourth proportional to 68,289.20, 102,337.80 and 54,273.20 is: 81,333.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,289.20 : 102,337.80 = 54,273.20 : x
  2. Step 2: Convert to fraction form
    68,289.20/102,337.80 = 54,273.20/x
  3. Step 3: Cross multiply
    68,289.20x = 102,337.80 × 54,273.20
  4. Step 4: Simplify right side
    68,289.20x = 5,554,199,886.96
  5. Step 5: Solve for x
    x = 5,554,199,886.96/68,289.20
  6. Step 6: Final answer
    x = 81,333.50

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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.