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Finding the Fourth Proportional to 258,428.02, 387,660.51 and 68,887.42

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Solution

The fourth proportional to 258,428.02, 387,660.51 and 68,887.42 is: 103,336.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,428.02 : 387,660.51 = 68,887.42 : x
  2. Step 2: Convert to fraction form
    258,428.02/387,660.51 = 68,887.42/x
  3. Step 3: Cross multiply
    258,428.02x = 387,660.51 × 68,887.42
  4. Step 4: Simplify right side
    258,428.02x = 26,704,930,661.74
  5. Step 5: Solve for x
    x = 26,704,930,661.74/258,428.02
  6. Step 6: Final answer
    x = 103,336.05

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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.