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Finding the Fourth Proportional to 170,756.20, 256,134.30 and 81,988.30

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Solution

The fourth proportional to 170,756.20, 256,134.30 and 81,988.30 is: 122,982.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,756.20 : 256,134.30 = 81,988.30 : x
  2. Step 2: Convert to fraction form
    170,756.20/256,134.30 = 81,988.30/x
  3. Step 3: Cross multiply
    170,756.20x = 256,134.30 × 81,988.30
  4. Step 4: Simplify right side
    170,756.20x = 21,000,015,828.69
  5. Step 5: Solve for x
    x = 21,000,015,828.69/170,756.20
  6. Step 6: Final answer
    x = 122,982.45

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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.