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Finding the Fourth Proportional to 77,346.82, 116,020.31 and 21,187.41

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Solution

The fourth proportional to 77,346.82, 116,020.31 and 21,187.41 is: 31,781.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,346.82 : 116,020.31 = 21,187.41 : x
  2. Step 2: Convert to fraction form
    77,346.82/116,020.31 = 21,187.41/x
  3. Step 3: Cross multiply
    77,346.82x = 116,020.31 × 21,187.41
  4. Step 4: Simplify right side
    77,346.82x = 2,458,169,751.45
  5. Step 5: Solve for x
    x = 2,458,169,751.45/77,346.82
  6. Step 6: Final answer
    x = 31,781.14

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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.