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Finding the Fourth Proportional to 138,626.96, 191,304.50 and 74,964.60

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Solution

The fourth proportional to 138,626.96, 191,304.50 and 74,964.60 is: 103,450.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,626.96 : 191,304.50 = 74,964.60 : x
  2. Step 2: Convert to fraction form
    138,626.96/191,304.50 = 74,964.60/x
  3. Step 3: Cross multiply
    138,626.96x = 191,304.50 × 74,964.60
  4. Step 4: Simplify right side
    138,626.96x = 14,341,064,945.88
  5. Step 5: Solve for x
    x = 14,341,064,945.88/138,626.96
  6. Step 6: Final answer
    x = 103,450.77

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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.