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Finding the Fourth Proportional to 71,398.80, 107,090.10 and 18,812.39

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Solution

The fourth proportional to 71,398.80, 107,090.10 and 18,812.39 is: 28,216.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,398.80 : 107,090.10 = 18,812.39 : x
  2. Step 2: Convert to fraction form
    71,398.80/107,090.10 = 18,812.39/x
  3. Step 3: Cross multiply
    71,398.80x = 107,090.10 × 18,812.39
  4. Step 4: Simplify right side
    71,398.80x = 2,014,620,190.89
  5. Step 5: Solve for x
    x = 2,014,620,190.89/71,398.80
  6. Step 6: Final answer
    x = 28,216.44

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1.5x scale

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.