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Finding the Fourth Proportional to 170,715.40, 256,073.10 and 81,923.20

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Solution

The fourth proportional to 170,715.40, 256,073.10 and 81,923.20 is: 122,884.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,715.40 : 256,073.10 = 81,923.20 : x
  2. Step 2: Convert to fraction form
    170,715.40/256,073.10 = 81,923.20/x
  3. Step 3: Cross multiply
    170,715.40x = 256,073.10 × 81,923.20
  4. Step 4: Simplify right side
    170,715.40x = 20,978,327,785.92
  5. Step 5: Solve for x
    x = 20,978,327,785.92/170,715.40
  6. Step 6: Final answer
    x = 122,884.80

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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.