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Finding the Fourth Proportional to 78,781.87, 118,172.94 and 23,377.87

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Solution

The fourth proportional to 78,781.87, 118,172.94 and 23,377.87 is: 35,066.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,781.87 : 118,172.94 = 23,377.87 : x
  2. Step 2: Convert to fraction form
    78,781.87/118,172.94 = 23,377.87/x
  3. Step 3: Cross multiply
    78,781.87x = 118,172.94 × 23,377.87
  4. Step 4: Simplify right side
    78,781.87x = 2,762,631,628.84
  5. Step 5: Solve for x
    x = 2,762,631,628.84/78,781.87
  6. Step 6: Final answer
    x = 35,066.85

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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.