Home / 85,647.39-128,471.10-26,481.75

Finding the Fourth Proportional to 85,647.39, 128,471.10 and 26,481.75

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Solution

The fourth proportional to 85,647.39, 128,471.10 and 26,481.75 is: 39,722.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,647.39 : 128,471.10 = 26,481.75 : x
  2. Step 2: Convert to fraction form
    85,647.39/128,471.10 = 26,481.75/x
  3. Step 3: Cross multiply
    85,647.39x = 128,471.10 × 26,481.75
  4. Step 4: Simplify right side
    85,647.39x = 3,402,139,552.43
  5. Step 5: Solve for x
    x = 3,402,139,552.43/85,647.39
  6. Step 6: Final answer
    x = 39,722.63

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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.