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Finding the Fourth Proportional to 103,411.65, 154,953.45 and 68,310.30

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Solution

The fourth proportional to 103,411.65, 154,953.45 and 68,310.30 is: 102,357.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,411.65 : 154,953.45 = 68,310.30 : x
  2. Step 2: Convert to fraction form
    103,411.65/154,953.45 = 68,310.30/x
  3. Step 3: Cross multiply
    103,411.65x = 154,953.45 × 68,310.30
  4. Step 4: Simplify right side
    103,411.65x = 10,584,916,655.54
  5. Step 5: Solve for x
    x = 10,584,916,655.54/103,411.65
  6. Step 6: Final answer
    x = 102,357.10

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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.