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Finding the Fourth Proportional to 138,554.80, 191,205 and 74,892.44

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Solution

The fourth proportional to 138,554.80, 191,205 and 74,892.44 is: 103,351.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,554.80 : 191,205 = 74,892.44 : x
  2. Step 2: Convert to fraction form
    138,554.80/191,205 = 74,892.44/x
  3. Step 3: Cross multiply
    138,554.80x = 191,205 × 74,892.44
  4. Step 4: Simplify right side
    138,554.80x = 14,319,808,990.20
  5. Step 5: Solve for x
    x = 14,319,808,990.20/138,554.80
  6. Step 6: Final answer
    x = 103,351.23

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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.