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Finding the Fourth Proportional to 73,072.98, 100,861.74 and 42,859.58

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Solution

The fourth proportional to 73,072.98, 100,861.74 and 42,859.58 is: 59,158.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,072.98 : 100,861.74 = 42,859.58 : x
  2. Step 2: Convert to fraction form
    73,072.98/100,861.74 = 42,859.58/x
  3. Step 3: Cross multiply
    73,072.98x = 100,861.74 × 42,859.58
  4. Step 4: Simplify right side
    73,072.98x = 4,322,891,310.16
  5. Step 5: Solve for x
    x = 4,322,891,310.16/73,072.98
  6. Step 6: Final answer
    x = 59,158.55

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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.