Home / 85,849.10-128,785.80-26,678.60

Finding the Fourth Proportional to 85,849.10, 128,785.80 and 26,678.60

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Solution

The fourth proportional to 85,849.10, 128,785.80 and 26,678.60 is: 40,021.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,849.10 : 128,785.80 = 26,678.60 : x
  2. Step 2: Convert to fraction form
    85,849.10/128,785.80 = 26,678.60/x
  3. Step 3: Cross multiply
    85,849.10x = 128,785.80 × 26,678.60
  4. Step 4: Simplify right side
    85,849.10x = 3,435,824,843.88
  5. Step 5: Solve for x
    x = 3,435,824,843.88/85,849.10
  6. Step 6: Final answer
    x = 40,021.68

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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.