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Finding the Fourth Proportional to 138,195.67, 206,908.58 and 70,581.32

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Solution

The fourth proportional to 138,195.67, 206,908.58 and 70,581.32 is: 105,675.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,195.67 : 206,908.58 = 70,581.32 : x
  2. Step 2: Convert to fraction form
    138,195.67/206,908.58 = 70,581.32/x
  3. Step 3: Cross multiply
    138,195.67x = 206,908.58 × 70,581.32
  4. Step 4: Simplify right side
    138,195.67x = 14,603,881,380.38
  5. Step 5: Solve for x
    x = 14,603,881,380.38/138,195.67
  6. Step 6: Final answer
    x = 105,675.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.