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Finding the Fourth Proportional to 170,891.72, 256,336.55 and 69,689.37

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Solution

The fourth proportional to 170,891.72, 256,336.55 and 69,689.37 is: 104,533.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,891.72 : 256,336.55 = 69,689.37 : x
  2. Step 2: Convert to fraction form
    170,891.72/256,336.55 = 69,689.37/x
  3. Step 3: Cross multiply
    170,891.72x = 256,336.55 × 69,689.37
  4. Step 4: Simplify right side
    170,891.72x = 17,863,932,677.47
  5. Step 5: Solve for x
    x = 17,863,932,677.47/170,891.72
  6. Step 6: Final answer
    x = 104,533.63

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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.