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Finding the Fourth Proportional to 144,928.40, 217,392.60 and 139,679.60

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Solution

The fourth proportional to 144,928.40, 217,392.60 and 139,679.60 is: 209,519.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,928.40 : 217,392.60 = 139,679.60 : x
  2. Step 2: Convert to fraction form
    144,928.40/217,392.60 = 139,679.60/x
  3. Step 3: Cross multiply
    144,928.40x = 217,392.60 × 139,679.60
  4. Step 4: Simplify right side
    144,928.40x = 30,365,311,410.96
  5. Step 5: Solve for x
    x = 30,365,311,410.96/144,928.40
  6. Step 6: Final answer
    x = 209,519.40

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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.