Home / 111,856.12-167,784-76,689.16

Finding the Fourth Proportional to 111,856.12, 167,784 and 76,689.16

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Solution

The fourth proportional to 111,856.12, 167,784 and 76,689.16 is: 115,033.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,856.12 : 167,784 = 76,689.16 : x
  2. Step 2: Convert to fraction form
    111,856.12/167,784 = 76,689.16/x
  3. Step 3: Cross multiply
    111,856.12x = 167,784 × 76,689.16
  4. Step 4: Simplify right side
    111,856.12x = 12,867,214,021.44
  5. Step 5: Solve for x
    x = 12,867,214,021.44/111,856.12
  6. Step 6: Final answer
    x = 115,033.62

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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.