Home / 121,613.64-167,778.50-81,263.49

Finding the Fourth Proportional to 121,613.64, 167,778.50 and 81,263.49

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Solution

The fourth proportional to 121,613.64, 167,778.50 and 81,263.49 is: 112,111.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,613.64 : 167,778.50 = 81,263.49 : x
  2. Step 2: Convert to fraction form
    121,613.64/167,778.50 = 81,263.49/x
  3. Step 3: Cross multiply
    121,613.64x = 167,778.50 × 81,263.49
  4. Step 4: Simplify right side
    121,613.64x = 13,634,266,456.97
  5. Step 5: Solve for x
    x = 13,634,266,456.97/121,613.64
  6. Step 6: Final answer
    x = 112,111.33

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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.