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Finding the Fourth Proportional to 71,809.44, 107,566.08 and 42,137.28

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Solution

The fourth proportional to 71,809.44, 107,566.08 and 42,137.28 is: 63,119.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,809.44 : 107,566.08 = 42,137.28 : x
  2. Step 2: Convert to fraction form
    71,809.44/107,566.08 = 42,137.28/x
  3. Step 3: Cross multiply
    71,809.44x = 107,566.08 × 42,137.28
  4. Step 4: Simplify right side
    71,809.44x = 4,532,542,031.46
  5. Step 5: Solve for x
    x = 4,532,542,031.46/71,809.44
  6. Step 6: Final answer
    x = 63,119.03

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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.