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Finding the Fourth Proportional to 258,679.19, 356,969.96 and 143,956

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Solution

The fourth proportional to 258,679.19, 356,969.96 and 143,956 is: 198,655.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,679.19 : 356,969.96 = 143,956 : x
  2. Step 2: Convert to fraction form
    258,679.19/356,969.96 = 143,956/x
  3. Step 3: Cross multiply
    258,679.19x = 356,969.96 × 143,956
  4. Step 4: Simplify right side
    258,679.19x = 51,387,967,561.76
  5. Step 5: Solve for x
    x = 51,387,967,561.76/258,679.19
  6. Step 6: Final answer
    x = 198,655.21

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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.