Home / 81,042.69-121,564.08-21,878.31

Finding the Fourth Proportional to 81,042.69, 121,564.08 and 21,878.31

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Solution

The fourth proportional to 81,042.69, 121,564.08 and 21,878.31 is: 32,817.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,042.69 : 121,564.08 = 21,878.31 : x
  2. Step 2: Convert to fraction form
    81,042.69/121,564.08 = 21,878.31/x
  3. Step 3: Cross multiply
    81,042.69x = 121,564.08 × 21,878.31
  4. Step 4: Simplify right side
    81,042.69x = 2,659,616,627.10
  5. Step 5: Solve for x
    x = 2,659,616,627.10/81,042.69
  6. Step 6: Final answer
    x = 32,817.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.