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Finding the Fourth Proportional to 147,912.40, 221,868.60 and 54,454.60

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Solution

The fourth proportional to 147,912.40, 221,868.60 and 54,454.60 is: 81,681.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,912.40 : 221,868.60 = 54,454.60 : x
  2. Step 2: Convert to fraction form
    147,912.40/221,868.60 = 54,454.60/x
  3. Step 3: Cross multiply
    147,912.40x = 221,868.60 × 54,454.60
  4. Step 4: Simplify right side
    147,912.40x = 12,081,765,865.56
  5. Step 5: Solve for x
    x = 12,081,765,865.56/147,912.40
  6. Step 6: Final answer
    x = 81,681.90

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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.