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Finding the Fourth Proportional to 101,485.98, 140,052.94 and 65,738.21

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Solution

The fourth proportional to 101,485.98, 140,052.94 and 65,738.21 is: 90,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,485.98 : 140,052.94 = 65,738.21 : x
  2. Step 2: Convert to fraction form
    101,485.98/140,052.94 = 65,738.21/x
  3. Step 3: Cross multiply
    101,485.98x = 140,052.94 × 65,738.21
  4. Step 4: Simplify right side
    101,485.98x = 9,206,828,716.23
  5. Step 5: Solve for x
    x = 9,206,828,716.23/101,485.98
  6. Step 6: Final answer
    x = 90,720.20

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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.