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Finding the Fourth Proportional to 139,891.05, 209,894.22 and 102,641.04

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Solution

The fourth proportional to 139,891.05, 209,894.22 and 102,641.04 is: 154,003.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,891.05 : 209,894.22 = 102,641.04 : x
  2. Step 2: Convert to fraction form
    139,891.05/209,894.22 = 102,641.04/x
  3. Step 3: Cross multiply
    139,891.05x = 209,894.22 × 102,641.04
  4. Step 4: Simplify right side
    139,891.05x = 21,543,761,030.79
  5. Step 5: Solve for x
    x = 21,543,761,030.79/139,891.05
  6. Step 6: Final answer
    x = 154,003.86

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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.