Home / 121,720.12-167,970.65-68,005.51

Finding the Fourth Proportional to 121,720.12, 167,970.65 and 68,005.51

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Solution

The fourth proportional to 121,720.12, 167,970.65 and 68,005.51 is: 93,845.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,720.12 : 167,970.65 = 68,005.51 : x
  2. Step 2: Convert to fraction form
    121,720.12/167,970.65 = 68,005.51/x
  3. Step 3: Cross multiply
    121,720.12x = 167,970.65 × 68,005.51
  4. Step 4: Simplify right side
    121,720.12x = 11,422,928,958.33
  5. Step 5: Solve for x
    x = 11,422,928,958.33/121,720.12
  6. Step 6: Final answer
    x = 93,845.86

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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.