Home / 121,512.72-167,683.60-66,319.92

Finding the Fourth Proportional to 121,512.72, 167,683.60 and 66,319.92

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Solution

The fourth proportional to 121,512.72, 167,683.60 and 66,319.92 is: 91,519.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,512.72 : 167,683.60 = 66,319.92 : x
  2. Step 2: Convert to fraction form
    121,512.72/167,683.60 = 66,319.92/x
  3. Step 3: Cross multiply
    121,512.72x = 167,683.60 × 66,319.92
  4. Step 4: Simplify right side
    121,512.72x = 11,120,762,937.31
  5. Step 5: Solve for x
    x = 11,120,762,937.31/121,512.72
  6. Step 6: Final answer
    x = 91,519.33

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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.