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Finding the Fourth Proportional to 70,717.80, 106,074.30 and 18,127.80

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Solution

The fourth proportional to 70,717.80, 106,074.30 and 18,127.80 is: 27,191.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,717.80 : 106,074.30 = 18,127.80 : x
  2. Step 2: Convert to fraction form
    70,717.80/106,074.30 = 18,127.80/x
  3. Step 3: Cross multiply
    70,717.80x = 106,074.30 × 18,127.80
  4. Step 4: Simplify right side
    70,717.80x = 1,922,893,695.54
  5. Step 5: Solve for x
    x = 1,922,893,695.54/70,717.80
  6. Step 6: Final answer
    x = 27,191.08

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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.