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Finding the Fourth Proportional to 77,868.75, 116,817.72 and 36,315.75

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Solution

The fourth proportional to 77,868.75, 116,817.72 and 36,315.75 is: 54,480.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,868.75 : 116,817.72 = 36,315.75 : x
  2. Step 2: Convert to fraction form
    77,868.75/116,817.72 = 36,315.75/x
  3. Step 3: Cross multiply
    77,868.75x = 116,817.72 × 36,315.75
  4. Step 4: Simplify right side
    77,868.75x = 4,242,323,115.09
  5. Step 5: Solve for x
    x = 4,242,323,115.09/77,868.75
  6. Step 6: Final answer
    x = 54,480.43

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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.