Home / 121,421.63-167,561.85-71,120.63

Finding the Fourth Proportional to 121,421.63, 167,561.85 and 71,120.63

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Solution

The fourth proportional to 121,421.63, 167,561.85 and 71,120.63 is: 98,146.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,421.63 : 167,561.85 = 71,120.63 : x
  2. Step 2: Convert to fraction form
    121,421.63/167,561.85 = 71,120.63/x
  3. Step 3: Cross multiply
    121,421.63x = 167,561.85 × 71,120.63
  4. Step 4: Simplify right side
    121,421.63x = 11,917,103,142.55
  5. Step 5: Solve for x
    x = 11,917,103,142.55/121,421.63
  6. Step 6: Final answer
    x = 98,146.46

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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.