Home / 78,590.40-117,906.24-28,675.20

Finding the Fourth Proportional to 78,590.40, 117,906.24 and 28,675.20

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Solution

The fourth proportional to 78,590.40, 117,906.24 and 28,675.20 is: 43,020.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,590.40 : 117,906.24 = 28,675.20 : x
  2. Step 2: Convert to fraction form
    78,590.40/117,906.24 = 28,675.20/x
  3. Step 3: Cross multiply
    78,590.40x = 117,906.24 × 28,675.20
  4. Step 4: Simplify right side
    78,590.40x = 3,380,985,013.25
  5. Step 5: Solve for x
    x = 3,380,985,013.25/78,590.40
  6. Step 6: Final answer
    x = 43,020.33

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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.