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Finding the Fourth Proportional to 78,956, 118,408.32 and 26,351.36

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Solution

The fourth proportional to 78,956, 118,408.32 and 26,351.36 is: 39,518.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,956 : 118,408.32 = 26,351.36 : x
  2. Step 2: Convert to fraction form
    78,956/118,408.32 = 26,351.36/x
  3. Step 3: Cross multiply
    78,956x = 118,408.32 × 26,351.36
  4. Step 4: Simplify right side
    78,956x = 3,120,220,267.32
  5. Step 5: Solve for x
    x = 3,120,220,267.32/78,956
  6. Step 6: Final answer
    x = 39,518.47

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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.