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Finding the Fourth Proportional to 261,591.75, 392,391.32 and 74,603.25

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Solution

The fourth proportional to 261,591.75, 392,391.32 and 74,603.25 is: 111,905.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,591.75 : 392,391.32 = 74,603.25 : x
  2. Step 2: Convert to fraction form
    261,591.75/392,391.32 = 74,603.25/x
  3. Step 3: Cross multiply
    261,591.75x = 392,391.32 × 74,603.25
  4. Step 4: Simplify right side
    261,591.75x = 29,273,667,370.77
  5. Step 5: Solve for x
    x = 29,273,667,370.77/261,591.75
  6. Step 6: Final answer
    x = 111,905.93

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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.