Home / 135,509.96-186,998.78-78,151.69

Finding the Fourth Proportional to 135,509.96, 186,998.78 and 78,151.69

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Solution

The fourth proportional to 135,509.96, 186,998.78 and 78,151.69 is: 107,846.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,509.96 : 186,998.78 = 78,151.69 : x
  2. Step 2: Convert to fraction form
    135,509.96/186,998.78 = 78,151.69/x
  3. Step 3: Cross multiply
    135,509.96x = 186,998.78 × 78,151.69
  4. Step 4: Simplify right side
    135,509.96x = 14,614,269,622.59
  5. Step 5: Solve for x
    x = 14,614,269,622.59/135,509.96
  6. Step 6: Final answer
    x = 107,846.46

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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.