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Finding the Fourth Proportional to 70,719.68, 106,083.30 and 18,129.62

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Solution

The fourth proportional to 70,719.68, 106,083.30 and 18,129.62 is: 27,195.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,719.68 : 106,083.30 = 18,129.62 : x
  2. Step 2: Convert to fraction form
    70,719.68/106,083.30 = 18,129.62/x
  3. Step 3: Cross multiply
    70,719.68x = 106,083.30 × 18,129.62
  4. Step 4: Simplify right side
    70,719.68x = 1,923,249,917.35
  5. Step 5: Solve for x
    x = 1,923,249,917.35/70,719.68
  6. Step 6: Final answer
    x = 27,195.40

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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.