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Finding the Fourth Proportional to 121,351.72, 167,466.21 and 67,640.20

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Solution

The fourth proportional to 121,351.72, 167,466.21 and 67,640.20 is: 93,343.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,351.72 : 167,466.21 = 67,640.20 : x
  2. Step 2: Convert to fraction form
    121,351.72/167,466.21 = 67,640.20/x
  3. Step 3: Cross multiply
    121,351.72x = 167,466.21 × 67,640.20
  4. Step 4: Simplify right side
    121,351.72x = 11,327,447,937.64
  5. Step 5: Solve for x
    x = 11,327,447,937.64/121,351.72
  6. Step 6: Final answer
    x = 93,343.94

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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.