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Finding the Fourth Proportional to 258,098.87, 387,129.17 and 108,333.11

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Solution

The fourth proportional to 258,098.87, 387,129.17 and 108,333.11 is: 162,491.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,098.87 : 387,129.17 = 108,333.11 : x
  2. Step 2: Convert to fraction form
    258,098.87/387,129.17 = 108,333.11/x
  3. Step 3: Cross multiply
    258,098.87x = 387,129.17 × 108,333.11
  4. Step 4: Simplify right side
    258,098.87x = 41,938,908,196.47
  5. Step 5: Solve for x
    x = 41,938,908,196.47/258,098.87
  6. Step 6: Final answer
    x = 162,491.64

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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.