Home / 130,640.28-180,286.74-79,655.64

Finding the Fourth Proportional to 130,640.28, 180,286.74 and 79,655.64

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Solution

The fourth proportional to 130,640.28, 180,286.74 and 79,655.64 is: 109,926.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,640.28 : 180,286.74 = 79,655.64 : x
  2. Step 2: Convert to fraction form
    130,640.28/180,286.74 = 79,655.64/x
  3. Step 3: Cross multiply
    130,640.28x = 180,286.74 × 79,655.64
  4. Step 4: Simplify right side
    130,640.28x = 14,360,855,658.21
  5. Step 5: Solve for x
    x = 14,360,855,658.21/130,640.28
  6. Step 6: Final answer
    x = 109,926.71

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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.