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Finding the Fourth Proportional to 172,356.96, 258,464.69 and 65,779.73

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Solution

The fourth proportional to 172,356.96, 258,464.69 and 65,779.73 is: 98,642.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,356.96 : 258,464.69 = 65,779.73 : x
  2. Step 2: Convert to fraction form
    172,356.96/258,464.69 = 65,779.73/x
  3. Step 3: Cross multiply
    172,356.96x = 258,464.69 × 65,779.73
  4. Step 4: Simplify right side
    172,356.96x = 17,001,735,901.51
  5. Step 5: Solve for x
    x = 17,001,735,901.51/172,356.96
  6. Step 6: Final answer
    x = 98,642.58

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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.