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Finding the Fourth Proportional to 191,552.97, 287,329.46 and 66,891.21

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Solution

The fourth proportional to 191,552.97, 287,329.46 and 66,891.21 is: 100,336.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,552.97 : 287,329.46 = 66,891.21 : x
  2. Step 2: Convert to fraction form
    191,552.97/287,329.46 = 66,891.21/x
  3. Step 3: Cross multiply
    191,552.97x = 287,329.46 × 66,891.21
  4. Step 4: Simplify right side
    191,552.97x = 19,219,814,913.59
  5. Step 5: Solve for x
    x = 19,219,814,913.59/191,552.97
  6. Step 6: Final answer
    x = 100,336.82

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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.