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Finding the Fourth Proportional to 78,974.70, 118,508.85 and 29,089.86

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Solution

The fourth proportional to 78,974.70, 118,508.85 and 29,089.86 is: 43,652.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,974.70 : 118,508.85 = 29,089.86 : x
  2. Step 2: Convert to fraction form
    78,974.70/118,508.85 = 29,089.86/x
  3. Step 3: Cross multiply
    78,974.70x = 118,508.85 × 29,089.86
  4. Step 4: Simplify right side
    78,974.70x = 3,447,405,855.26
  5. Step 5: Solve for x
    x = 3,447,405,855.26/78,974.70
  6. Step 6: Final answer
    x = 43,652.03

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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.