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Finding the Fourth Proportional to 258,958.55, 357,372.51 and 142,676.80

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Solution

The fourth proportional to 258,958.55, 357,372.51 and 142,676.80 is: 196,899.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,958.55 : 357,372.51 = 142,676.80 : x
  2. Step 2: Convert to fraction form
    258,958.55/357,372.51 = 142,676.80/x
  3. Step 3: Cross multiply
    258,958.55x = 357,372.51 × 142,676.80
  4. Step 4: Simplify right side
    258,958.55x = 50,988,765,711.41
  5. Step 5: Solve for x
    x = 50,988,765,711.41/258,958.55
  6. Step 6: Final answer
    x = 196,899.33

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1.5x scale

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.