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Finding the Fourth Proportional to 70,031.58, 104,964.34 and 40,388.21

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Solution

The fourth proportional to 70,031.58, 104,964.34 and 40,388.21 is: 60,534.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,031.58 : 104,964.34 = 40,388.21 : x
  2. Step 2: Convert to fraction form
    70,031.58/104,964.34 = 40,388.21/x
  3. Step 3: Cross multiply
    70,031.58x = 104,964.34 × 40,388.21
  4. Step 4: Simplify right side
    70,031.58x = 4,239,321,604.49
  5. Step 5: Solve for x
    x = 4,239,321,604.49/70,031.58
  6. Step 6: Final answer
    x = 60,534.43

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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.