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Finding the Fourth Proportional to 64,103.26, 87,991.66 and 56,871.58

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Solution

The fourth proportional to 64,103.26, 87,991.66 and 56,871.58 is: 78,065.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,103.26 : 87,991.66 = 56,871.58 : x
  2. Step 2: Convert to fraction form
    64,103.26/87,991.66 = 56,871.58/x
  3. Step 3: Cross multiply
    64,103.26x = 87,991.66 × 56,871.58
  4. Step 4: Simplify right side
    64,103.26x = 5,004,224,731.02
  5. Step 5: Solve for x
    x = 5,004,224,731.02/64,103.26
  6. Step 6: Final answer
    x = 78,065.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.