Home / 105,621.12-145,769.76-65,361.60

Finding the Fourth Proportional to 105,621.12, 145,769.76 and 65,361.60

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Solution

The fourth proportional to 105,621.12, 145,769.76 and 65,361.60 is: 90,206.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,621.12 : 145,769.76 = 65,361.60 : x
  2. Step 2: Convert to fraction form
    105,621.12/145,769.76 = 65,361.60/x
  3. Step 3: Cross multiply
    105,621.12x = 145,769.76 × 65,361.60
  4. Step 4: Simplify right side
    105,621.12x = 9,527,744,745.22
  5. Step 5: Solve for x
    x = 9,527,744,745.22/105,621.12
  6. Step 6: Final answer
    x = 90,206.81

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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.