Home / 85,979.05-128,986.80-26,002.60

Finding the Fourth Proportional to 85,979.05, 128,986.80 and 26,002.60

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Solution

The fourth proportional to 85,979.05, 128,986.80 and 26,002.60 is: 39,009.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,979.05 : 128,986.80 = 26,002.60 : x
  2. Step 2: Convert to fraction form
    85,979.05/128,986.80 = 26,002.60/x
  3. Step 3: Cross multiply
    85,979.05x = 128,986.80 × 26,002.60
  4. Step 4: Simplify right side
    85,979.05x = 3,353,992,165.68
  5. Step 5: Solve for x
    x = 3,353,992,165.68/85,979.05
  6. Step 6: Final answer
    x = 39,009.41

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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.