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Finding the Fourth Proportional to 81,484.90, 112,447.15 and 45,186.15

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Solution

The fourth proportional to 81,484.90, 112,447.15 and 45,186.15 is: 62,355.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,484.90 : 112,447.15 = 45,186.15 : x
  2. Step 2: Convert to fraction form
    81,484.90/112,447.15 = 45,186.15/x
  3. Step 3: Cross multiply
    81,484.90x = 112,447.15 × 45,186.15
  4. Step 4: Simplify right side
    81,484.90x = 5,081,053,786.97
  5. Step 5: Solve for x
    x = 5,081,053,786.97/81,484.90
  6. Step 6: Final answer
    x = 62,355.77

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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.