Home / 85,472.28-128,208.42-23,142.78

Finding the Fourth Proportional to 85,472.28, 128,208.42 and 23,142.78

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Solution

The fourth proportional to 85,472.28, 128,208.42 and 23,142.78 is: 34,714.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,472.28 : 128,208.42 = 23,142.78 : x
  2. Step 2: Convert to fraction form
    85,472.28/128,208.42 = 23,142.78/x
  3. Step 3: Cross multiply
    85,472.28x = 128,208.42 × 23,142.78
  4. Step 4: Simplify right side
    85,472.28x = 2,967,099,258.21
  5. Step 5: Solve for x
    x = 2,967,099,258.21/85,472.28
  6. Step 6: Final answer
    x = 34,714.17

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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.