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Finding the Fourth Proportional to 81,712.58, 112,775.56 and 49,899.92

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Solution

The fourth proportional to 81,712.58, 112,775.56 and 49,899.92 is: 68,869.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,712.58 : 112,775.56 = 49,899.92 : x
  2. Step 2: Convert to fraction form
    81,712.58/112,775.56 = 49,899.92/x
  3. Step 3: Cross multiply
    81,712.58x = 112,775.56 × 49,899.92
  4. Step 4: Simplify right side
    81,712.58x = 5,627,491,421.96
  5. Step 5: Solve for x
    x = 5,627,491,421.96/81,712.58
  6. Step 6: Final answer
    x = 68,869.34

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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.