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Finding the Fourth Proportional to 68,752.20, 102,926.70 and 51,299.40

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Solution

The fourth proportional to 68,752.20, 102,926.70 and 51,299.40 is: 76,798.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,752.20 : 102,926.70 = 51,299.40 : x
  2. Step 2: Convert to fraction form
    68,752.20/102,926.70 = 51,299.40/x
  3. Step 3: Cross multiply
    68,752.20x = 102,926.70 × 51,299.40
  4. Step 4: Simplify right side
    68,752.20x = 5,280,077,953.98
  5. Step 5: Solve for x
    x = 5,280,077,953.98/68,752.20
  6. Step 6: Final answer
    x = 76,798.68

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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.