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Finding the Fourth Proportional to 290,187.92, 434,767.05 and 121,336.13

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Solution

The fourth proportional to 290,187.92, 434,767.05 and 121,336.13 is: 181,788.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,187.92 : 434,767.05 = 121,336.13 : x
  2. Step 2: Convert to fraction form
    290,187.92/434,767.05 = 121,336.13/x
  3. Step 3: Cross multiply
    290,187.92x = 434,767.05 × 121,336.13
  4. Step 4: Simplify right side
    290,187.92x = 52,752,949,124.68
  5. Step 5: Solve for x
    x = 52,752,949,124.68/290,187.92
  6. Step 6: Final answer
    x = 181,788.93

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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.