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Finding the Fourth Proportional to 121,648.16, 167,874.86 and 67,935.17

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Solution

The fourth proportional to 121,648.16, 167,874.86 and 67,935.17 is: 93,750.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,648.16 : 167,874.86 = 67,935.17 : x
  2. Step 2: Convert to fraction form
    121,648.16/167,874.86 = 67,935.17/x
  3. Step 3: Cross multiply
    121,648.16x = 167,874.86 × 67,935.17
  4. Step 4: Simplify right side
    121,648.16x = 11,404,607,742.35
  5. Step 5: Solve for x
    x = 11,404,607,742.35/121,648.16
  6. Step 6: Final answer
    x = 93,750.76

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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.