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Finding the Fourth Proportional to 78,812.52, 118,218.80 and 23,408.52

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Solution

The fourth proportional to 78,812.52, 118,218.80 and 23,408.52 is: 35,112.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,812.52 : 118,218.80 = 23,408.52 : x
  2. Step 2: Convert to fraction form
    78,812.52/118,218.80 = 23,408.52/x
  3. Step 3: Cross multiply
    78,812.52x = 118,218.80 × 23,408.52
  4. Step 4: Simplify right side
    78,812.52x = 2,767,327,144.18
  5. Step 5: Solve for x
    x = 2,767,327,144.18/78,812.52
  6. Step 6: Final answer
    x = 35,112.79

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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.