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Finding the Fourth Proportional to 63,670.22, 87,865.42 and 39,810.72

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Solution

The fourth proportional to 63,670.22, 87,865.42 and 39,810.72 is: 54,939.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,670.22 : 87,865.42 = 39,810.72 : x
  2. Step 2: Convert to fraction form
    63,670.22/87,865.42 = 39,810.72/x
  3. Step 3: Cross multiply
    63,670.22x = 87,865.42 × 39,810.72
  4. Step 4: Simplify right side
    63,670.22x = 3,497,985,952.49
  5. Step 5: Solve for x
    x = 3,497,985,952.49/63,670.22
  6. Step 6: Final answer
    x = 54,939.12

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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.