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Finding the Fourth Proportional to 258,099.62, 387,130.30 and 108,333.86

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Solution

The fourth proportional to 258,099.62, 387,130.30 and 108,333.86 is: 162,492.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,099.62 : 387,130.30 = 108,333.86 : x
  2. Step 2: Convert to fraction form
    258,099.62/387,130.30 = 108,333.86/x
  3. Step 3: Cross multiply
    258,099.62x = 387,130.30 × 108,333.86
  4. Step 4: Simplify right side
    258,099.62x = 41,939,320,418.95
  5. Step 5: Solve for x
    x = 41,939,320,418.95/258,099.62
  6. Step 6: Final answer
    x = 162,492.76

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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.