Home / 135,344.75-186,732.81-78,745.19

Finding the Fourth Proportional to 135,344.75, 186,732.81 and 78,745.19

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Solution

The fourth proportional to 135,344.75, 186,732.81 and 78,745.19 is: 108,643.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,344.75 : 186,732.81 = 78,745.19 : x
  2. Step 2: Convert to fraction form
    135,344.75/186,732.81 = 78,745.19/x
  3. Step 3: Cross multiply
    135,344.75x = 186,732.81 × 78,745.19
  4. Step 4: Simplify right side
    135,344.75x = 14,704,309,669.02
  5. Step 5: Solve for x
    x = 14,704,309,669.02/135,344.75
  6. Step 6: Final answer
    x = 108,643.37

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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.