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Finding the Fourth Proportional to 77,485.26, 116,212.62 and 21,310.94

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Solution

The fourth proportional to 77,485.26, 116,212.62 and 21,310.94 is: 31,962.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,485.26 : 116,212.62 = 21,310.94 : x
  2. Step 2: Convert to fraction form
    77,485.26/116,212.62 = 21,310.94/x
  3. Step 3: Cross multiply
    77,485.26x = 116,212.62 × 21,310.94
  4. Step 4: Simplify right side
    77,485.26x = 2,476,600,172.06
  5. Step 5: Solve for x
    x = 2,476,600,172.06/77,485.26
  6. Step 6: Final answer
    x = 31,962.21

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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.