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Finding the Fourth Proportional to 121,353.78, 167,469 and 67,642.18

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Solution

The fourth proportional to 121,353.78, 167,469 and 67,642.18 is: 93,346.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,353.78 : 167,469 = 67,642.18 : x
  2. Step 2: Convert to fraction form
    121,353.78/167,469 = 67,642.18/x
  3. Step 3: Cross multiply
    121,353.78x = 167,469 × 67,642.18
  4. Step 4: Simplify right side
    121,353.78x = 11,327,968,242.42
  5. Step 5: Solve for x
    x = 11,327,968,242.42/121,353.78
  6. Step 6: Final answer
    x = 93,346.65

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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.