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Finding the Fourth Proportional to 121,188.69, 167,322.51 and 75,884.85

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Solution

The fourth proportional to 121,188.69, 167,322.51 and 75,884.85 is: 104,772.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,188.69 : 167,322.51 = 75,884.85 : x
  2. Step 2: Convert to fraction form
    121,188.69/167,322.51 = 75,884.85/x
  3. Step 3: Cross multiply
    121,188.69x = 167,322.51 × 75,884.85
  4. Step 4: Simplify right side
    121,188.69x = 12,697,243,572.97
  5. Step 5: Solve for x
    x = 12,697,243,572.97/121,188.69
  6. Step 6: Final answer
    x = 104,772.51

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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.