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Finding the Fourth Proportional to 68,123.76, 102,139.74 and 34,816.56

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Solution

The fourth proportional to 68,123.76, 102,139.74 and 34,816.56 is: 52,201.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,123.76 : 102,139.74 = 34,816.56 : x
  2. Step 2: Convert to fraction form
    68,123.76/102,139.74 = 34,816.56/x
  3. Step 3: Cross multiply
    68,123.76x = 102,139.74 × 34,816.56
  4. Step 4: Simplify right side
    68,123.76x = 3,556,154,386.09
  5. Step 5: Solve for x
    x = 3,556,154,386.09/68,123.76
  6. Step 6: Final answer
    x = 52,201.38

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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.