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Finding the Fourth Proportional to 121,139.88, 167,171.76 and 67,424.12

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Solution

The fourth proportional to 121,139.88, 167,171.76 and 67,424.12 is: 93,044.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,139.88 : 167,171.76 = 67,424.12 : x
  2. Step 2: Convert to fraction form
    121,139.88/167,171.76 = 67,424.12/x
  3. Step 3: Cross multiply
    121,139.88x = 167,171.76 × 67,424.12
  4. Step 4: Simplify right side
    121,139.88x = 11,271,408,806.85
  5. Step 5: Solve for x
    x = 11,271,408,806.85/121,139.88
  6. Step 6: Final answer
    x = 93,044.58

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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.