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Finding the Fourth Proportional to 63,670.72, 87,866.12 and 39,811.23

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Solution

The fourth proportional to 63,670.72, 87,866.12 and 39,811.23 is: 54,939.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,670.72 : 87,866.12 = 39,811.23 : x
  2. Step 2: Convert to fraction form
    63,670.72/87,866.12 = 39,811.23/x
  3. Step 3: Cross multiply
    63,670.72x = 87,866.12 × 39,811.23
  4. Step 4: Simplify right side
    63,670.72x = 3,498,057,674.14
  5. Step 5: Solve for x
    x = 3,498,057,674.14/63,670.72
  6. Step 6: Final answer
    x = 54,939.82

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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.