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Finding the Fourth Proportional to 107,809.72, 161,731.88 and 45,489.40

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Solution

The fourth proportional to 107,809.72, 161,731.88 and 45,489.40 is: 68,241.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,809.72 : 161,731.88 = 45,489.40 : x
  2. Step 2: Convert to fraction form
    107,809.72/161,731.88 = 45,489.40/x
  3. Step 3: Cross multiply
    107,809.72x = 161,731.88 × 45,489.40
  4. Step 4: Simplify right side
    107,809.72x = 7,357,086,182.07
  5. Step 5: Solve for x
    x = 7,357,086,182.07/107,809.72
  6. Step 6: Final answer
    x = 68,241.40

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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.