Home / 208,115.26-312,046.47-81,603.93

Finding the Fourth Proportional to 208,115.26, 312,046.47 and 81,603.93

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Solution

The fourth proportional to 208,115.26, 312,046.47 and 81,603.93 is: 122,356.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,115.26 : 312,046.47 = 81,603.93 : x
  2. Step 2: Convert to fraction form
    208,115.26/312,046.47 = 81,603.93/x
  3. Step 3: Cross multiply
    208,115.26x = 312,046.47 × 81,603.93
  4. Step 4: Simplify right side
    208,115.26x = 25,464,219,770.82
  5. Step 5: Solve for x
    x = 25,464,219,770.82/208,115.26
  6. Step 6: Final answer
    x = 122,356.33

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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.