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Finding the Fourth Proportional to 71,696.70, 107,415.45 and 61,328.70

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Solution

The fourth proportional to 71,696.70, 107,415.45 and 61,328.70 is: 91,882.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,696.70 : 107,415.45 = 61,328.70 : x
  2. Step 2: Convert to fraction form
    71,696.70/107,415.45 = 61,328.70/x
  3. Step 3: Cross multiply
    71,696.70x = 107,415.45 × 61,328.70
  4. Step 4: Simplify right side
    71,696.70x = 6,587,649,908.42
  5. Step 5: Solve for x
    x = 6,587,649,908.42/71,696.70
  6. Step 6: Final answer
    x = 91,882.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.