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Finding the Fourth Proportional to 70,613.38, 105,919.96 and 18,022.86

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Solution

The fourth proportional to 70,613.38, 105,919.96 and 18,022.86 is: 27,034.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,613.38 : 105,919.96 = 18,022.86 : x
  2. Step 2: Convert to fraction form
    70,613.38/105,919.96 = 18,022.86/x
  3. Step 3: Cross multiply
    70,613.38x = 105,919.96 × 18,022.86
  4. Step 4: Simplify right side
    70,613.38x = 1,908,980,610.29
  5. Step 5: Solve for x
    x = 1,908,980,610.29/70,613.38
  6. Step 6: Final answer
    x = 27,034.26

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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.