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Finding the Fourth Proportional to 39,156.40, 58,745.40 and 19,435.60

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Solution

The fourth proportional to 39,156.40, 58,745.40 and 19,435.60 is: 29,158.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,156.40 : 58,745.40 = 19,435.60 : x
  2. Step 2: Convert to fraction form
    39,156.40/58,745.40 = 19,435.60/x
  3. Step 3: Cross multiply
    39,156.40x = 58,745.40 × 19,435.60
  4. Step 4: Simplify right side
    39,156.40x = 1,141,752,096.24
  5. Step 5: Solve for x
    x = 1,141,752,096.24/39,156.40
  6. Step 6: Final answer
    x = 29,158.76

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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.