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Finding the Fourth Proportional to 100,713.67, 138,985.81 and 54,773.73

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Solution

The fourth proportional to 100,713.67, 138,985.81 and 54,773.73 is: 75,588.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,713.67 : 138,985.81 = 54,773.73 : x
  2. Step 2: Convert to fraction form
    100,713.67/138,985.81 = 54,773.73/x
  3. Step 3: Cross multiply
    100,713.67x = 138,985.81 × 54,773.73
  4. Step 4: Simplify right side
    100,713.67x = 7,612,771,615.03
  5. Step 5: Solve for x
    x = 7,612,771,615.03/100,713.67
  6. Step 6: Final answer
    x = 75,588.26

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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.