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Finding the Fourth Proportional to 70,228.31, 96,891.32 and 39,992.20

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Solution

The fourth proportional to 70,228.31, 96,891.32 and 39,992.20 is: 55,175.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,228.31 : 96,891.32 = 39,992.20 : x
  2. Step 2: Convert to fraction form
    70,228.31/96,891.32 = 39,992.20/x
  3. Step 3: Cross multiply
    70,228.31x = 96,891.32 × 39,992.20
  4. Step 4: Simplify right side
    70,228.31x = 3,874,896,905.46
  5. Step 5: Solve for x
    x = 3,874,896,905.46/70,228.31
  6. Step 6: Final answer
    x = 55,175.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.