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Finding the Fourth Proportional to 121,908.24, 167,859.54 and 106,715.88

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Solution

The fourth proportional to 121,908.24, 167,859.54 and 106,715.88 is: 146,940.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,908.24 : 167,859.54 = 106,715.88 : x
  2. Step 2: Convert to fraction form
    121,908.24/167,859.54 = 106,715.88/x
  3. Step 3: Cross multiply
    121,908.24x = 167,859.54 × 106,715.88
  4. Step 4: Simplify right side
    121,908.24x = 17,913,278,527.50
  5. Step 5: Solve for x
    x = 17,913,278,527.50/121,908.24
  6. Step 6: Final answer
    x = 146,940.67

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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.