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Finding the Fourth Proportional to 121,401, 167,535.47 and 67,680.09

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Solution

The fourth proportional to 121,401, 167,535.47 and 67,680.09 is: 93,399.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,401 : 167,535.47 = 67,680.09 : x
  2. Step 2: Convert to fraction form
    121,401/167,535.47 = 67,680.09/x
  3. Step 3: Cross multiply
    121,401x = 167,535.47 × 67,680.09
  4. Step 4: Simplify right side
    121,401x = 11,338,815,856.99
  5. Step 5: Solve for x
    x = 11,338,815,856.99/121,401
  6. Step 6: Final answer
    x = 93,399.69

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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.