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Finding the Fourth Proportional to 81,695.66, 112,745.52 and 45,401.31

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Solution

The fourth proportional to 81,695.66, 112,745.52 and 45,401.31 is: 62,656.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,695.66 : 112,745.52 = 45,401.31 : x
  2. Step 2: Convert to fraction form
    81,695.66/112,745.52 = 45,401.31/x
  3. Step 3: Cross multiply
    81,695.66x = 112,745.52 × 45,401.31
  4. Step 4: Simplify right side
    81,695.66x = 5,118,794,304.63
  5. Step 5: Solve for x
    x = 5,118,794,304.63/81,695.66
  6. Step 6: Final answer
    x = 62,656.87

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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.