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Finding the Fourth Proportional to 78,792.60, 118,205.10 and 26,239.80

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Solution

The fourth proportional to 78,792.60, 118,205.10 and 26,239.80 is: 39,365.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,792.60 : 118,205.10 = 26,239.80 : x
  2. Step 2: Convert to fraction form
    78,792.60/118,205.10 = 26,239.80/x
  3. Step 3: Cross multiply
    78,792.60x = 118,205.10 × 26,239.80
  4. Step 4: Simplify right side
    78,792.60x = 3,101,678,182.98
  5. Step 5: Solve for x
    x = 3,101,678,182.98/78,792.60
  6. Step 6: Final answer
    x = 39,365.09

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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.