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Finding the Fourth Proportional to 71,398.88, 107,103.52 and 18,808

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Solution

The fourth proportional to 71,398.88, 107,103.52 and 18,808 is: 28,213.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,398.88 : 107,103.52 = 18,808 : x
  2. Step 2: Convert to fraction form
    71,398.88/107,103.52 = 18,808/x
  3. Step 3: Cross multiply
    71,398.88x = 107,103.52 × 18,808
  4. Step 4: Simplify right side
    71,398.88x = 2,014,403,004.16
  5. Step 5: Solve for x
    x = 2,014,403,004.16/71,398.88
  6. Step 6: Final answer
    x = 28,213.37

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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.