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Finding the Fourth Proportional to 85,417.80, 128,163.15 and 41,021.70

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Solution

The fourth proportional to 85,417.80, 128,163.15 and 41,021.70 is: 61,550.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,417.80 : 128,163.15 = 41,021.70 : x
  2. Step 2: Convert to fraction form
    85,417.80/128,163.15 = 41,021.70/x
  3. Step 3: Cross multiply
    85,417.80x = 128,163.15 × 41,021.70
  4. Step 4: Simplify right side
    85,417.80x = 5,257,470,290.36
  5. Step 5: Solve for x
    x = 5,257,470,290.36/85,417.80
  6. Step 6: Final answer
    x = 61,550.06

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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.