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Finding the Fourth Proportional to 121,496.15, 167,664.23 and 67,781.21

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Solution

The fourth proportional to 121,496.15, 167,664.23 and 67,781.21 is: 93,537.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,496.15 : 167,664.23 = 67,781.21 : x
  2. Step 2: Convert to fraction form
    121,496.15/167,664.23 = 67,781.21/x
  3. Step 3: Cross multiply
    121,496.15x = 167,664.23 × 67,781.21
  4. Step 4: Simplify right side
    121,496.15x = 11,364,483,460.07
  5. Step 5: Solve for x
    x = 11,364,483,460.07/121,496.15
  6. Step 6: Final answer
    x = 93,537.81

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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.