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Finding the Fourth Proportional to 51,986.88, 77,980.32 and 16,930.08

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Solution

The fourth proportional to 51,986.88, 77,980.32 and 16,930.08 is: 25,395.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,986.88 : 77,980.32 = 16,930.08 : x
  2. Step 2: Convert to fraction form
    51,986.88/77,980.32 = 16,930.08/x
  3. Step 3: Cross multiply
    51,986.88x = 77,980.32 × 16,930.08
  4. Step 4: Simplify right side
    51,986.88x = 1,320,213,056.03
  5. Step 5: Solve for x
    x = 1,320,213,056.03/51,986.88
  6. Step 6: Final answer
    x = 25,395.12

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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.