Home / 119,118.72-178,640.16-39,138.12

Finding the Fourth Proportional to 119,118.72, 178,640.16 and 39,138.12

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Solution

The fourth proportional to 119,118.72, 178,640.16 and 39,138.12 is: 58,694.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,118.72 : 178,640.16 = 39,138.12 : x
  2. Step 2: Convert to fraction form
    119,118.72/178,640.16 = 39,138.12/x
  3. Step 3: Cross multiply
    119,118.72x = 178,640.16 × 39,138.12
  4. Step 4: Simplify right side
    119,118.72x = 6,991,640,018.90
  5. Step 5: Solve for x
    x = 6,991,640,018.90/119,118.72
  6. Step 6: Final answer
    x = 58,694.72

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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.