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Finding the Fourth Proportional to 144,880.40, 217,320.60 and 139,631.60

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Solution

The fourth proportional to 144,880.40, 217,320.60 and 139,631.60 is: 209,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,880.40 : 217,320.60 = 139,631.60 : x
  2. Step 2: Convert to fraction form
    144,880.40/217,320.60 = 139,631.60/x
  3. Step 3: Cross multiply
    144,880.40x = 217,320.60 × 139,631.60
  4. Step 4: Simplify right side
    144,880.40x = 30,344,823,090.96
  5. Step 5: Solve for x
    x = 30,344,823,090.96/144,880.40
  6. Step 6: Final answer
    x = 209,447.40

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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.