Home / 85,818.05-128,559.49-40,775.31

Finding the Fourth Proportional to 85,818.05, 128,559.49 and 40,775.31

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Solution

The fourth proportional to 85,818.05, 128,559.49 and 40,775.31 is: 61,083.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,818.05 : 128,559.49 = 40,775.31 : x
  2. Step 2: Convert to fraction form
    85,818.05/128,559.49 = 40,775.31/x
  3. Step 3: Cross multiply
    85,818.05x = 128,559.49 × 40,775.31
  4. Step 4: Simplify right side
    85,818.05x = 5,242,052,495.52
  5. Step 5: Solve for x
    x = 5,242,052,495.52/85,818.05
  6. Step 6: Final answer
    x = 61,083.33

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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.