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Finding the Fourth Proportional to 85,801.14, 128,750.04 and 67,028.51

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Solution

The fourth proportional to 85,801.14, 128,750.04 and 67,028.51 is: 100,580.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,801.14 : 128,750.04 = 67,028.51 : x
  2. Step 2: Convert to fraction form
    85,801.14/128,750.04 = 67,028.51/x
  3. Step 3: Cross multiply
    85,801.14x = 128,750.04 × 67,028.51
  4. Step 4: Simplify right side
    85,801.14x = 8,629,923,665.52
  5. Step 5: Solve for x
    x = 8,629,923,665.52/85,801.14
  6. Step 6: Final answer
    x = 100,580.52

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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.