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Finding the Fourth Proportional to 121,500.75, 167,671.14 and 67,785.78

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Solution

The fourth proportional to 121,500.75, 167,671.14 and 67,785.78 is: 93,544.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,500.75 : 167,671.14 = 67,785.78 : x
  2. Step 2: Convert to fraction form
    121,500.75/167,671.14 = 67,785.78/x
  3. Step 3: Cross multiply
    121,500.75x = 167,671.14 × 67,785.78
  4. Step 4: Simplify right side
    121,500.75x = 11,365,717,831.10
  5. Step 5: Solve for x
    x = 11,365,717,831.10/121,500.75
  6. Step 6: Final answer
    x = 93,544.43

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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.