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Finding the Fourth Proportional to 170,012.88, 255,019.77 and 81,246.20

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Solution

The fourth proportional to 170,012.88, 255,019.77 and 81,246.20 is: 121,869.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,012.88 : 255,019.77 = 81,246.20 : x
  2. Step 2: Convert to fraction form
    170,012.88/255,019.77 = 81,246.20/x
  3. Step 3: Cross multiply
    170,012.88x = 255,019.77 × 81,246.20
  4. Step 4: Simplify right side
    170,012.88x = 20,719,385,962.28
  5. Step 5: Solve for x
    x = 20,719,385,962.28/170,012.88
  6. Step 6: Final answer
    x = 121,869.51

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1.5x scale

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.