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Finding the Fourth Proportional to 65,994, 91,072.08 and 39,150

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Solution

The fourth proportional to 65,994, 91,072.08 and 39,150 is: 54,027.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,994 : 91,072.08 = 39,150 : x
  2. Step 2: Convert to fraction form
    65,994/91,072.08 = 39,150/x
  3. Step 3: Cross multiply
    65,994x = 91,072.08 × 39,150
  4. Step 4: Simplify right side
    65,994x = 3,565,471,932
  5. Step 5: Solve for x
    x = 3,565,471,932/65,994
  6. Step 6: Final answer
    x = 54,027.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.