Home / 111,785.07-154,332.32-76,919.70

Finding the Fourth Proportional to 111,785.07, 154,332.32 and 76,919.70

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Solution

The fourth proportional to 111,785.07, 154,332.32 and 76,919.70 is: 106,196.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,785.07 : 154,332.32 = 76,919.70 : x
  2. Step 2: Convert to fraction form
    111,785.07/154,332.32 = 76,919.70/x
  3. Step 3: Cross multiply
    111,785.07x = 154,332.32 × 76,919.70
  4. Step 4: Simplify right side
    111,785.07x = 11,871,195,370.11
  5. Step 5: Solve for x
    x = 11,871,195,370.11/111,785.07
  6. Step 6: Final answer
    x = 106,196.61

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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.