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Finding the Fourth Proportional to 427,880.00, 641,921.22 and 139,690.10

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Solution

The fourth proportional to 427,880.00, 641,921.22 and 139,690.10 is: 209,568.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,880.00 : 641,921.22 = 139,690.10 : x
  2. Step 2: Convert to fraction form
    427,880.00/641,921.22 = 139,690.10/x
  3. Step 3: Cross multiply
    427,880.00x = 641,921.22 × 139,690.10
  4. Step 4: Simplify right side
    427,880.00x = 89,670,041,018.73
  5. Step 5: Solve for x
    x = 89,670,041,018.73/427,880.00
  6. Step 6: Final answer
    x = 209,568.20

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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.