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Finding the Fourth Proportional to 64,103.76, 87,992.34 and 56,872.08

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Solution

The fourth proportional to 64,103.76, 87,992.34 and 56,872.08 is: 78,065.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,103.76 : 87,992.34 = 56,872.08 : x
  2. Step 2: Convert to fraction form
    64,103.76/87,992.34 = 56,872.08/x
  3. Step 3: Cross multiply
    64,103.76x = 87,992.34 × 56,872.08
  4. Step 4: Simplify right side
    64,103.76x = 5,004,307,399.87
  5. Step 5: Solve for x
    x = 5,004,307,399.87/64,103.76
  6. Step 6: Final answer
    x = 78,065.74

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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.