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Finding the Fourth Proportional to 78,493.54, 117,739.23 and 19,329.70

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Solution

The fourth proportional to 78,493.54, 117,739.23 and 19,329.70 is: 28,994.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,493.54 : 117,739.23 = 19,329.70 : x
  2. Step 2: Convert to fraction form
    78,493.54/117,739.23 = 19,329.70/x
  3. Step 3: Cross multiply
    78,493.54x = 117,739.23 × 19,329.70
  4. Step 4: Simplify right side
    78,493.54x = 2,275,863,994.13
  5. Step 5: Solve for x
    x = 2,275,863,994.13/78,493.54
  6. Step 6: Final answer
    x = 28,994.28

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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.