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Finding the Fourth Proportional to 170,426.80, 255,448.20 and 81,722.80

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Solution

The fourth proportional to 170,426.80, 255,448.20 and 81,722.80 is: 122,492.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,426.80 : 255,448.20 = 81,722.80 : x
  2. Step 2: Convert to fraction form
    170,426.80/255,448.20 = 81,722.80/x
  3. Step 3: Cross multiply
    170,426.80x = 255,448.20 × 81,722.80
  4. Step 4: Simplify right side
    170,426.80x = 20,875,942,158.96
  5. Step 5: Solve for x
    x = 20,875,942,158.96/170,426.80
  6. Step 6: Final answer
    x = 122,492.13

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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.