Home / 121,587.51-167,761.20-71,276.79

Finding the Fourth Proportional to 121,587.51, 167,761.20 and 71,276.79

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Solution

The fourth proportional to 121,587.51, 167,761.20 and 71,276.79 is: 98,344.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,587.51 : 167,761.20 = 71,276.79 : x
  2. Step 2: Convert to fraction form
    121,587.51/167,761.20 = 71,276.79/x
  3. Step 3: Cross multiply
    121,587.51x = 167,761.20 × 71,276.79
  4. Step 4: Simplify right side
    121,587.51x = 11,957,479,822.55
  5. Step 5: Solve for x
    x = 11,957,479,822.55/121,587.51
  6. Step 6: Final answer
    x = 98,344.64

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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.