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Finding the Fourth Proportional to 65,987.61, 91,039.04 and 43,338.87

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Solution

The fourth proportional to 65,987.61, 91,039.04 and 43,338.87 is: 59,791.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,987.61 : 91,039.04 = 43,338.87 : x
  2. Step 2: Convert to fraction form
    65,987.61/91,039.04 = 43,338.87/x
  3. Step 3: Cross multiply
    65,987.61x = 91,039.04 × 43,338.87
  4. Step 4: Simplify right side
    65,987.61x = 3,945,529,321.36
  5. Step 5: Solve for x
    x = 3,945,529,321.36/65,987.61
  6. Step 6: Final answer
    x = 59,791.97

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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.