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Finding the Fourth Proportional to 258,459.88, 356,676.60 and 143,740.12

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Solution

The fourth proportional to 258,459.88, 356,676.60 and 143,740.12 is: 198,362.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,459.88 : 356,676.60 = 143,740.12 : x
  2. Step 2: Convert to fraction form
    258,459.88/356,676.60 = 143,740.12/x
  3. Step 3: Cross multiply
    258,459.88x = 356,676.60 × 143,740.12
  4. Step 4: Simplify right side
    258,459.88x = 51,268,737,285.19
  5. Step 5: Solve for x
    x = 51,268,737,285.19/258,459.88
  6. Step 6: Final answer
    x = 198,362.46

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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.