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Finding the Fourth Proportional to 170,995.80, 256,498.14 and 81,017.46

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Solution

The fourth proportional to 170,995.80, 256,498.14 and 81,017.46 is: 121,528.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,995.80 : 256,498.14 = 81,017.46 : x
  2. Step 2: Convert to fraction form
    170,995.80/256,498.14 = 81,017.46/x
  3. Step 3: Cross multiply
    170,995.80x = 256,498.14 × 81,017.46
  4. Step 4: Simplify right side
    170,995.80x = 20,780,827,797.52
  5. Step 5: Solve for x
    x = 20,780,827,797.52/170,995.80
  6. Step 6: Final answer
    x = 121,528.29

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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.