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Finding the Fourth Proportional to 258,627.62, 356,899.01 and 143,900.43

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Solution

The fourth proportional to 258,627.62, 356,899.01 and 143,900.43 is: 198,578.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,627.62 : 356,899.01 = 143,900.43 : x
  2. Step 2: Convert to fraction form
    258,627.62/356,899.01 = 143,900.43/x
  3. Step 3: Cross multiply
    258,627.62x = 356,899.01 × 143,900.43
  4. Step 4: Simplify right side
    258,627.62x = 51,357,920,286.07
  5. Step 5: Solve for x
    x = 51,357,920,286.07/258,627.62
  6. Step 6: Final answer
    x = 198,578.64

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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.