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Finding the Fourth Proportional to 56,118.60, 84,118.72 and 18,668.64

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Solution

The fourth proportional to 56,118.60, 84,118.72 and 18,668.64 is: 27,983.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,118.60 : 84,118.72 = 18,668.64 : x
  2. Step 2: Convert to fraction form
    56,118.60/84,118.72 = 18,668.64/x
  3. Step 3: Cross multiply
    56,118.60x = 84,118.72 × 18,668.64
  4. Step 4: Simplify right side
    56,118.60x = 1,570,382,100.94
  5. Step 5: Solve for x
    x = 1,570,382,100.94/56,118.60
  6. Step 6: Final answer
    x = 27,983.27

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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.