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Finding the Fourth Proportional to 81,264.44, 112,145.04 and 45,455

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Solution

The fourth proportional to 81,264.44, 112,145.04 and 45,455 is: 62,727.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,264.44 : 112,145.04 = 45,455 : x
  2. Step 2: Convert to fraction form
    81,264.44/112,145.04 = 45,455/x
  3. Step 3: Cross multiply
    81,264.44x = 112,145.04 × 45,455
  4. Step 4: Simplify right side
    81,264.44x = 5,097,552,793.20
  5. Step 5: Solve for x
    x = 5,097,552,793.20/81,264.44
  6. Step 6: Final answer
    x = 62,727.96

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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.