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Finding the Fourth Proportional to 138,090.08, 206,991.48 and 93,720.44

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Solution

The fourth proportional to 138,090.08, 206,991.48 and 93,720.44 is: 140,483.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,090.08 : 206,991.48 = 93,720.44 : x
  2. Step 2: Convert to fraction form
    138,090.08/206,991.48 = 93,720.44/x
  3. Step 3: Cross multiply
    138,090.08x = 206,991.48 × 93,720.44
  4. Step 4: Simplify right side
    138,090.08x = 19,399,332,581.85
  5. Step 5: Solve for x
    x = 19,399,332,581.85/138,090.08
  6. Step 6: Final answer
    x = 140,483.17

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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.