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Finding the Fourth Proportional to 121,520.13, 167,697.74 and 67,805.13

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Solution

The fourth proportional to 121,520.13, 167,697.74 and 67,805.13 is: 93,571.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,520.13 : 167,697.74 = 67,805.13 : x
  2. Step 2: Convert to fraction form
    121,520.13/167,697.74 = 67,805.13/x
  3. Step 3: Cross multiply
    121,520.13x = 167,697.74 × 67,805.13
  4. Step 4: Simplify right side
    121,520.13x = 11,370,766,722.38
  5. Step 5: Solve for x
    x = 11,370,766,722.38/121,520.13
  6. Step 6: Final answer
    x = 93,571.05

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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.