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Finding the Fourth Proportional to 85,556.71, 128,356.94 and 35,620.21

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Solution

The fourth proportional to 85,556.71, 128,356.94 and 35,620.21 is: 53,439.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,556.71 : 128,356.94 = 35,620.21 : x
  2. Step 2: Convert to fraction form
    85,556.71/128,356.94 = 35,620.21/x
  3. Step 3: Cross multiply
    85,556.71x = 128,356.94 × 35,620.21
  4. Step 4: Simplify right side
    85,556.71x = 4,572,100,658.76
  5. Step 5: Solve for x
    x = 4,572,100,658.76/85,556.71
  6. Step 6: Final answer
    x = 53,439.42

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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.