Home / 128,540.08-192,662.28-49,619.76

Finding the Fourth Proportional to 128,540.08, 192,662.28 and 49,619.76

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Solution

The fourth proportional to 128,540.08, 192,662.28 and 49,619.76 is: 74,372.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,540.08 : 192,662.28 = 49,619.76 : x
  2. Step 2: Convert to fraction form
    128,540.08/192,662.28 = 49,619.76/x
  3. Step 3: Cross multiply
    128,540.08x = 192,662.28 × 49,619.76
  4. Step 4: Simplify right side
    128,540.08x = 9,559,856,094.65
  5. Step 5: Solve for x
    x = 9,559,856,094.65/128,540.08
  6. Step 6: Final answer
    x = 74,372.57

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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.