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Finding the Fourth Proportional to 78,559.65, 117,839.71 and 19,395.33

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Solution

The fourth proportional to 78,559.65, 117,839.71 and 19,395.33 is: 29,093.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,559.65 : 117,839.71 = 19,395.33 : x
  2. Step 2: Convert to fraction form
    78,559.65/117,839.71 = 19,395.33/x
  3. Step 3: Cross multiply
    78,559.65x = 117,839.71 × 19,395.33
  4. Step 4: Simplify right side
    78,559.65x = 2,285,539,644.90
  5. Step 5: Solve for x
    x = 2,285,539,644.90/78,559.65
  6. Step 6: Final answer
    x = 29,093.05

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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.