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Finding the Fourth Proportional to 65,133.96, 89,873.40 and 39,991.56

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Solution

The fourth proportional to 65,133.96, 89,873.40 and 39,991.56 is: 55,181.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,133.96 : 89,873.40 = 39,991.56 : x
  2. Step 2: Convert to fraction form
    65,133.96/89,873.40 = 39,991.56/x
  3. Step 3: Cross multiply
    65,133.96x = 89,873.40 × 39,991.56
  4. Step 4: Simplify right side
    65,133.96x = 3,594,177,468.50
  5. Step 5: Solve for x
    x = 3,594,177,468.50/65,133.96
  6. Step 6: Final answer
    x = 55,181.31

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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.