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Finding the Fourth Proportional to 104,745.48, 157,119.90 and 99,428.64

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Solution

The fourth proportional to 104,745.48, 157,119.90 and 99,428.64 is: 149,144.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,745.48 : 157,119.90 = 99,428.64 : x
  2. Step 2: Convert to fraction form
    104,745.48/157,119.90 = 99,428.64/x
  3. Step 3: Cross multiply
    104,745.48x = 157,119.90 × 99,428.64
  4. Step 4: Simplify right side
    104,745.48x = 15,622,217,973.94
  5. Step 5: Solve for x
    x = 15,622,217,973.94/104,745.48
  6. Step 6: Final answer
    x = 149,144.55

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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.