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Finding the Fourth Proportional to 170,719.70, 256,079.55 and 81,951.80

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Solution

The fourth proportional to 170,719.70, 256,079.55 and 81,951.80 is: 122,927.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,719.70 : 256,079.55 = 81,951.80 : x
  2. Step 2: Convert to fraction form
    170,719.70/256,079.55 = 81,951.80/x
  3. Step 3: Cross multiply
    170,719.70x = 256,079.55 × 81,951.80
  4. Step 4: Simplify right side
    170,719.70x = 20,986,180,065.69
  5. Step 5: Solve for x
    x = 20,986,180,065.69/170,719.70
  6. Step 6: Final answer
    x = 122,927.70

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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.