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Finding the Fourth Proportional to 121,138.55, 167,169.51 and 67,423.58

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Solution

The fourth proportional to 121,138.55, 167,169.51 and 67,423.58 is: 93,043.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,138.55 : 167,169.51 = 67,423.58 : x
  2. Step 2: Convert to fraction form
    121,138.55/167,169.51 = 67,423.58/x
  3. Step 3: Cross multiply
    121,138.55x = 167,169.51 × 67,423.58
  4. Step 4: Simplify right side
    121,138.55x = 11,271,166,831.05
  5. Step 5: Solve for x
    x = 11,271,166,831.05/121,138.55
  6. Step 6: Final answer
    x = 93,043.60

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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.