Home / 85,986.10-128,979.96-26,015.05

Finding the Fourth Proportional to 85,986.10, 128,979.96 and 26,015.05

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Solution

The fourth proportional to 85,986.10, 128,979.96 and 26,015.05 is: 39,022.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,986.10 : 128,979.96 = 26,015.05 : x
  2. Step 2: Convert to fraction form
    85,986.10/128,979.96 = 26,015.05/x
  3. Step 3: Cross multiply
    85,986.10x = 128,979.96 × 26,015.05
  4. Step 4: Simplify right side
    85,986.10x = 3,355,420,108.40
  5. Step 5: Solve for x
    x = 3,355,420,108.40/85,986.10
  6. Step 6: Final answer
    x = 39,022.82

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1.5x scale

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.