Home / 111,857.12-167,785.50-76,690.16

Finding the Fourth Proportional to 111,857.12, 167,785.50 and 76,690.16

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Solution

The fourth proportional to 111,857.12, 167,785.50 and 76,690.16 is: 115,035.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,857.12 : 167,785.50 = 76,690.16 : x
  2. Step 2: Convert to fraction form
    111,857.12/167,785.50 = 76,690.16/x
  3. Step 3: Cross multiply
    111,857.12x = 167,785.50 × 76,690.16
  4. Step 4: Simplify right side
    111,857.12x = 12,867,496,840.68
  5. Step 5: Solve for x
    x = 12,867,496,840.68/111,857.12
  6. Step 6: Final answer
    x = 115,035.12

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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.