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Finding the Fourth Proportional to 258,779.16, 388,165.02 and 81,296.82

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Solution

The fourth proportional to 258,779.16, 388,165.02 and 81,296.82 is: 121,944.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,779.16 : 388,165.02 = 81,296.82 : x
  2. Step 2: Convert to fraction form
    258,779.16/388,165.02 = 81,296.82/x
  3. Step 3: Cross multiply
    258,779.16x = 388,165.02 × 81,296.82
  4. Step 4: Simplify right side
    258,779.16x = 31,556,581,761.24
  5. Step 5: Solve for x
    x = 31,556,581,761.24/258,779.16
  6. Step 6: Final answer
    x = 121,944.06

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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.