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Finding the Fourth Proportional to 155,408.52, 214,463.44 and 87,425.54

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Solution

The fourth proportional to 155,408.52, 214,463.44 and 87,425.54 is: 120,647.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,408.52 : 214,463.44 = 87,425.54 : x
  2. Step 2: Convert to fraction form
    155,408.52/214,463.44 = 87,425.54/x
  3. Step 3: Cross multiply
    155,408.52x = 214,463.44 × 87,425.54
  4. Step 4: Simplify right side
    155,408.52x = 18,749,582,052.26
  5. Step 5: Solve for x
    x = 18,749,582,052.26/155,408.52
  6. Step 6: Final answer
    x = 120,647.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.