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Finding the Fourth Proportional to 81,258.88, 112,137.52 and 45,449.50

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Solution

The fourth proportional to 81,258.88, 112,137.52 and 45,449.50 is: 62,720.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,258.88 : 112,137.52 = 45,449.50 : x
  2. Step 2: Convert to fraction form
    81,258.88/112,137.52 = 45,449.50/x
  3. Step 3: Cross multiply
    81,258.88x = 112,137.52 × 45,449.50
  4. Step 4: Simplify right side
    81,258.88x = 5,096,594,215.24
  5. Step 5: Solve for x
    x = 5,096,594,215.24/81,258.88
  6. Step 6: Final answer
    x = 62,720.46

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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.