Home / 121,829.78-168,127.17-68,109.02

Finding the Fourth Proportional to 121,829.78, 168,127.17 and 68,109.02

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Solution

The fourth proportional to 121,829.78, 168,127.17 and 68,109.02 is: 93,991.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,829.78 : 168,127.17 = 68,109.02 : x
  2. Step 2: Convert to fraction form
    121,829.78/168,127.17 = 68,109.02/x
  3. Step 3: Cross multiply
    121,829.78x = 168,127.17 × 68,109.02
  4. Step 4: Simplify right side
    121,829.78x = 11,450,976,784.07
  5. Step 5: Solve for x
    x = 11,450,976,784.07/121,829.78
  6. Step 6: Final answer
    x = 93,991.61

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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.