Home / 121,721.10-167,958.42-67,999.44

Finding the Fourth Proportional to 121,721.10, 167,958.42 and 67,999.44

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Solution

The fourth proportional to 121,721.10, 167,958.42 and 67,999.44 is: 93,829.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,721.10 : 167,958.42 = 67,999.44 : x
  2. Step 2: Convert to fraction form
    121,721.10/167,958.42 = 67,999.44/x
  3. Step 3: Cross multiply
    121,721.10x = 167,958.42 × 67,999.44
  4. Step 4: Simplify right side
    121,721.10x = 11,421,078,503.28
  5. Step 5: Solve for x
    x = 11,421,078,503.28/121,721.10
  6. Step 6: Final answer
    x = 93,829.90

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1.5x scale

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.