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Finding the Fourth Proportional to 78,559.71, 117,839.81 and 19,395.39

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Solution

The fourth proportional to 78,559.71, 117,839.81 and 19,395.39 is: 29,093.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,559.71 : 117,839.81 = 19,395.39 : x
  2. Step 2: Convert to fraction form
    78,559.71/117,839.81 = 19,395.39/x
  3. Step 3: Cross multiply
    78,559.71x = 117,839.81 × 19,395.39
  4. Step 4: Simplify right side
    78,559.71x = 2,285,549,072.48
  5. Step 5: Solve for x
    x = 2,285,549,072.48/78,559.71
  6. Step 6: Final answer
    x = 29,093.15

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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.