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Finding the Fourth Proportional to 65,768.57, 90,739.11 and 40,248.33

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Solution

The fourth proportional to 65,768.57, 90,739.11 and 40,248.33 is: 55,529.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,768.57 : 90,739.11 = 40,248.33 : x
  2. Step 2: Convert to fraction form
    65,768.57/90,739.11 = 40,248.33/x
  3. Step 3: Cross multiply
    65,768.57x = 90,739.11 × 40,248.33
  4. Step 4: Simplify right side
    65,768.57x = 3,652,097,340.65
  5. Step 5: Solve for x
    x = 3,652,097,340.65/65,768.57
  6. Step 6: Final answer
    x = 55,529.53

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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.