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Finding the Fourth Proportional to 171,956.10, 258,028.29 and 66,779.22

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Solution

The fourth proportional to 171,956.10, 258,028.29 and 66,779.22 is: 100,205.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,956.10 : 258,028.29 = 66,779.22 : x
  2. Step 2: Convert to fraction form
    171,956.10/258,028.29 = 66,779.22/x
  3. Step 3: Cross multiply
    171,956.10x = 258,028.29 × 66,779.22
  4. Step 4: Simplify right side
    171,956.10x = 17,230,927,944.13
  5. Step 5: Solve for x
    x = 17,230,927,944.13/171,956.10
  6. Step 6: Final answer
    x = 100,205.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.