Home / 130,568.72-180,286.40-100,306.32

Finding the Fourth Proportional to 130,568.72, 180,286.40 and 100,306.32

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Solution

The fourth proportional to 130,568.72, 180,286.40 and 100,306.32 is: 138,500.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,568.72 : 180,286.40 = 100,306.32 : x
  2. Step 2: Convert to fraction form
    130,568.72/180,286.40 = 100,306.32/x
  3. Step 3: Cross multiply
    130,568.72x = 180,286.40 × 100,306.32
  4. Step 4: Simplify right side
    130,568.72x = 18,083,865,330.05
  5. Step 5: Solve for x
    x = 18,083,865,330.05/130,568.72
  6. Step 6: Final answer
    x = 138,500.75

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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.