Home / 121,138.40-167,169.30-67,423.43

Finding the Fourth Proportional to 121,138.40, 167,169.30 and 67,423.43

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Solution

The fourth proportional to 121,138.40, 167,169.30 and 67,423.43 is: 93,043.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,138.40 : 167,169.30 = 67,423.43 : x
  2. Step 2: Convert to fraction form
    121,138.40/167,169.30 = 67,423.43/x
  3. Step 3: Cross multiply
    121,138.40x = 167,169.30 × 67,423.43
  4. Step 4: Simplify right side
    121,138.40x = 11,271,126,760.85
  5. Step 5: Solve for x
    x = 11,271,126,760.85/121,138.40
  6. Step 6: Final answer
    x = 93,043.39

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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.