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Finding the Fourth Proportional to 43,578.16, 65,392.76 and 17,279.64

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Solution

The fourth proportional to 43,578.16, 65,392.76 and 17,279.64 is: 25,929.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,578.16 : 65,392.76 = 17,279.64 : x
  2. Step 2: Convert to fraction form
    43,578.16/65,392.76 = 17,279.64/x
  3. Step 3: Cross multiply
    43,578.16x = 65,392.76 × 17,279.64
  4. Step 4: Simplify right side
    43,578.16x = 1,129,963,351.41
  5. Step 5: Solve for x
    x = 1,129,963,351.41/43,578.16
  6. Step 6: Final answer
    x = 25,929.58

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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.