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Finding the Fourth Proportional to 81,648.48, 112,682.88 and 49,838.64

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Solution

The fourth proportional to 81,648.48, 112,682.88 and 49,838.64 is: 68,782.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,648.48 : 112,682.88 = 49,838.64 : x
  2. Step 2: Convert to fraction form
    81,648.48/112,682.88 = 49,838.64/x
  3. Step 3: Cross multiply
    81,648.48x = 112,682.88 × 49,838.64
  4. Step 4: Simplify right side
    81,648.48x = 5,615,961,490.48
  5. Step 5: Solve for x
    x = 5,615,961,490.48/81,648.48
  6. Step 6: Final answer
    x = 68,782.19

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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.