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Finding the Fourth Proportional to 78,354.54, 117,531 and 19,190.52

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Solution

The fourth proportional to 78,354.54, 117,531 and 19,190.52 is: 28,785.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,354.54 : 117,531 = 19,190.52 : x
  2. Step 2: Convert to fraction form
    78,354.54/117,531 = 19,190.52/x
  3. Step 3: Cross multiply
    78,354.54x = 117,531 × 19,190.52
  4. Step 4: Simplify right side
    78,354.54x = 2,255,481,006.12
  5. Step 5: Solve for x
    x = 2,255,481,006.12/78,354.54
  6. Step 6: Final answer
    x = 28,785.58

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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.