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Finding the Fourth Proportional to 121,000.50, 166,984.74 and 66,554.97

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Solution

The fourth proportional to 121,000.50, 166,984.74 and 66,554.97 is: 91,848.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,000.50 : 166,984.74 = 66,554.97 : x
  2. Step 2: Convert to fraction form
    121,000.50/166,984.74 = 66,554.97/x
  3. Step 3: Cross multiply
    121,000.50x = 166,984.74 × 66,554.97
  4. Step 4: Simplify right side
    121,000.50x = 11,113,664,361.16
  5. Step 5: Solve for x
    x = 11,113,664,361.16/121,000.50
  6. Step 6: Final answer
    x = 91,848.09

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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.