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Finding the Fourth Proportional to 123,645.90, 170,631.54 and 67,057.32

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Solution

The fourth proportional to 123,645.90, 170,631.54 and 67,057.32 is: 92,539.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,645.90 : 170,631.54 = 67,057.32 : x
  2. Step 2: Convert to fraction form
    123,645.90/170,631.54 = 67,057.32/x
  3. Step 3: Cross multiply
    123,645.90x = 170,631.54 × 67,057.32
  4. Step 4: Simplify right side
    123,645.90x = 11,442,093,779.87
  5. Step 5: Solve for x
    x = 11,442,093,779.87/123,645.90
  6. Step 6: Final answer
    x = 92,539.21

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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.