Home / 85,515.07-128,274.78-40,525.87

Finding the Fourth Proportional to 85,515.07, 128,274.78 and 40,525.87

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Solution

The fourth proportional to 85,515.07, 128,274.78 and 40,525.87 is: 60,789.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,515.07 : 128,274.78 = 40,525.87 : x
  2. Step 2: Convert to fraction form
    85,515.07/128,274.78 = 40,525.87/x
  3. Step 3: Cross multiply
    85,515.07x = 128,274.78 × 40,525.87
  4. Step 4: Simplify right side
    85,515.07x = 5,198,447,058.56
  5. Step 5: Solve for x
    x = 5,198,447,058.56/85,515.07
  6. Step 6: Final answer
    x = 60,789.84

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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.