Home / 85,582.56-128,336.37-40,616.78

Finding the Fourth Proportional to 85,582.56, 128,336.37 and 40,616.78

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Solution

The fourth proportional to 85,582.56, 128,336.37 and 40,616.78 is: 60,907.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,582.56 : 128,336.37 = 40,616.78 : x
  2. Step 2: Convert to fraction form
    85,582.56/128,336.37 = 40,616.78/x
  3. Step 3: Cross multiply
    85,582.56x = 128,336.37 × 40,616.78
  4. Step 4: Simplify right side
    85,582.56x = 5,212,609,464.61
  5. Step 5: Solve for x
    x = 5,212,609,464.61/85,582.56
  6. Step 6: Final answer
    x = 60,907.38

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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.