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Finding the Fourth Proportional to 65,966.37, 91,017.73 and 39,115.48

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Solution

The fourth proportional to 65,966.37, 91,017.73 and 39,115.48 is: 53,969.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,966.37 : 91,017.73 = 39,115.48 : x
  2. Step 2: Convert to fraction form
    65,966.37/91,017.73 = 39,115.48/x
  3. Step 3: Cross multiply
    65,966.37x = 91,017.73 × 39,115.48
  4. Step 4: Simplify right side
    65,966.37x = 3,560,202,197.46
  5. Step 5: Solve for x
    x = 3,560,202,197.46/65,966.37
  6. Step 6: Final answer
    x = 53,969.96

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1.5x scale

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.