Home / 85,979.22-128,969.78-26,008.31

Finding the Fourth Proportional to 85,979.22, 128,969.78 and 26,008.31

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Solution

The fourth proportional to 85,979.22, 128,969.78 and 26,008.31 is: 39,012.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,979.22 : 128,969.78 = 26,008.31 : x
  2. Step 2: Convert to fraction form
    85,979.22/128,969.78 = 26,008.31/x
  3. Step 3: Cross multiply
    85,979.22x = 128,969.78 × 26,008.31
  4. Step 4: Simplify right side
    85,979.22x = 3,354,285,243.98
  5. Step 5: Solve for x
    x = 3,354,285,243.98/85,979.22
  6. Step 6: Final answer
    x = 39,012.74

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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.