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Finding the Fourth Proportional to 71,872.72, 99,225.48 and 48,039.76

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Solution

The fourth proportional to 71,872.72, 99,225.48 and 48,039.76 is: 66,322.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,872.72 : 99,225.48 = 48,039.76 : x
  2. Step 2: Convert to fraction form
    71,872.72/99,225.48 = 48,039.76/x
  3. Step 3: Cross multiply
    71,872.72x = 99,225.48 × 48,039.76
  4. Step 4: Simplify right side
    71,872.72x = 4,766,768,245.08
  5. Step 5: Solve for x
    x = 4,766,768,245.08/71,872.72
  6. Step 6: Final answer
    x = 66,322.36

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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.