Home / 91,161.91-136,742.05-31,983.72

Finding the Fourth Proportional to 91,161.91, 136,742.05 and 31,983.72

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Solution

The fourth proportional to 91,161.91, 136,742.05 and 31,983.72 is: 47,975.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,161.91 : 136,742.05 = 31,983.72 : x
  2. Step 2: Convert to fraction form
    91,161.91/136,742.05 = 31,983.72/x
  3. Step 3: Cross multiply
    91,161.91x = 136,742.05 × 31,983.72
  4. Step 4: Simplify right side
    91,161.91x = 4,373,519,439.43
  5. Step 5: Solve for x
    x = 4,373,519,439.43/91,161.91
  6. Step 6: Final answer
    x = 47,975.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.