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Finding the Fourth Proportional to 125,990.40, 189,012.24 and 41,745.78

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Solution

The fourth proportional to 125,990.40, 189,012.24 and 41,745.78 is: 62,627.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,990.40 : 189,012.24 = 41,745.78 : x
  2. Step 2: Convert to fraction form
    125,990.40/189,012.24 = 41,745.78/x
  3. Step 3: Cross multiply
    125,990.40x = 189,012.24 × 41,745.78
  4. Step 4: Simplify right side
    125,990.40x = 7,890,463,388.35
  5. Step 5: Solve for x
    x = 7,890,463,388.35/125,990.40
  6. Step 6: Final answer
    x = 62,627.50

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1.5x scale

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.