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Finding the Fourth Proportional to 121,912.84, 168,273.53 and 70,935.42

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Solution

The fourth proportional to 121,912.84, 168,273.53 and 70,935.42 is: 97,910.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,912.84 : 168,273.53 = 70,935.42 : x
  2. Step 2: Convert to fraction form
    121,912.84/168,273.53 = 70,935.42/x
  3. Step 3: Cross multiply
    121,912.84x = 168,273.53 × 70,935.42
  4. Step 4: Simplify right side
    121,912.84x = 11,936,553,525.43
  5. Step 5: Solve for x
    x = 11,936,553,525.43/121,912.84
  6. Step 6: Final answer
    x = 97,910.55

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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.