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Finding the Fourth Proportional to 258,495.78, 356,720.67 and 143,773.32

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Solution

The fourth proportional to 258,495.78, 356,720.67 and 143,773.32 is: 198,405.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,495.78 : 356,720.67 = 143,773.32 : x
  2. Step 2: Convert to fraction form
    258,495.78/356,720.67 = 143,773.32/x
  3. Step 3: Cross multiply
    258,495.78x = 356,720.67 × 143,773.32
  4. Step 4: Simplify right side
    258,495.78x = 51,286,915,038.52
  5. Step 5: Solve for x
    x = 51,286,915,038.52/258,495.78
  6. Step 6: Final answer
    x = 198,405.23

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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.