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Finding the Fourth Proportional to 68,748.80, 102,950.40 and 51,123.20

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Solution

The fourth proportional to 68,748.80, 102,950.40 and 51,123.20 is: 76,556.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,748.80 : 102,950.40 = 51,123.20 : x
  2. Step 2: Convert to fraction form
    68,748.80/102,950.40 = 51,123.20/x
  3. Step 3: Cross multiply
    68,748.80x = 102,950.40 × 51,123.20
  4. Step 4: Simplify right side
    68,748.80x = 5,263,153,889.28
  5. Step 5: Solve for x
    x = 5,263,153,889.28/68,748.80
  6. Step 6: Final answer
    x = 76,556.30

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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.