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Finding the Fourth Proportional to 77,398.37, 116,097.67 and 21,239.25

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Solution

The fourth proportional to 77,398.37, 116,097.67 and 21,239.25 is: 31,858.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,398.37 : 116,097.67 = 21,239.25 : x
  2. Step 2: Convert to fraction form
    77,398.37/116,097.67 = 21,239.25/x
  3. Step 3: Cross multiply
    77,398.37x = 116,097.67 × 21,239.25
  4. Step 4: Simplify right side
    77,398.37x = 2,465,827,028.73
  5. Step 5: Solve for x
    x = 2,465,827,028.73/77,398.37
  6. Step 6: Final answer
    x = 31,858.90

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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.