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Finding the Fourth Proportional to 78,791.74, 118,188.59 and 26,201.21

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Solution

The fourth proportional to 78,791.74, 118,188.59 and 26,201.21 is: 39,302.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,791.74 : 118,188.59 = 26,201.21 : x
  2. Step 2: Convert to fraction form
    78,791.74/118,188.59 = 26,201.21/x
  3. Step 3: Cross multiply
    78,791.74x = 118,188.59 × 26,201.21
  4. Step 4: Simplify right side
    78,791.74x = 3,096,683,344.24
  5. Step 5: Solve for x
    x = 3,096,683,344.24/78,791.74
  6. Step 6: Final answer
    x = 39,302.13

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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.