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Finding the Fourth Proportional to 81,360, 112,197.96 and 63,448.48

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Solution

The fourth proportional to 81,360, 112,197.96 and 63,448.48 is: 87,497.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,360 : 112,197.96 = 63,448.48 : x
  2. Step 2: Convert to fraction form
    81,360/112,197.96 = 63,448.48/x
  3. Step 3: Cross multiply
    81,360x = 112,197.96 × 63,448.48
  4. Step 4: Simplify right side
    81,360x = 7,118,790,021.10
  5. Step 5: Solve for x
    x = 7,118,790,021.10/81,360
  6. Step 6: Final answer
    x = 87,497.42

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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.