Home / 121,163.60-167,111.04-78,735.76

Finding the Fourth Proportional to 121,163.60, 167,111.04 and 78,735.76

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Solution

The fourth proportional to 121,163.60, 167,111.04 and 78,735.76 is: 108,593.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,163.60 : 167,111.04 = 78,735.76 : x
  2. Step 2: Convert to fraction form
    121,163.60/167,111.04 = 78,735.76/x
  3. Step 3: Cross multiply
    121,163.60x = 167,111.04 × 78,735.76
  4. Step 4: Simplify right side
    121,163.60x = 13,157,614,738.79
  5. Step 5: Solve for x
    x = 13,157,614,738.79/121,163.60
  6. Step 6: Final answer
    x = 108,593.79

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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.