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Finding the Fourth Proportional to 63,486.72, 87,571.80 and 40,855.32

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Solution

The fourth proportional to 63,486.72, 87,571.80 and 40,855.32 is: 56,354.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,486.72 : 87,571.80 = 40,855.32 : x
  2. Step 2: Convert to fraction form
    63,486.72/87,571.80 = 40,855.32/x
  3. Step 3: Cross multiply
    63,486.72x = 87,571.80 × 40,855.32
  4. Step 4: Simplify right side
    63,486.72x = 3,577,773,911.98
  5. Step 5: Solve for x
    x = 3,577,773,911.98/63,486.72
  6. Step 6: Final answer
    x = 56,354.68

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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.