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Finding the Fourth Proportional to 258,659.60, 356,918.91 and 143,911.16

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Solution

The fourth proportional to 258,659.60, 356,918.91 and 143,911.16 is: 198,579.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,659.60 : 356,918.91 = 143,911.16 : x
  2. Step 2: Convert to fraction form
    258,659.60/356,918.91 = 143,911.16/x
  3. Step 3: Cross multiply
    258,659.60x = 356,918.91 × 143,911.16
  4. Step 4: Simplify right side
    258,659.60x = 51,364,612,579.44
  5. Step 5: Solve for x
    x = 51,364,612,579.44/258,659.60
  6. Step 6: Final answer
    x = 198,579.96

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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.