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Finding the Fourth Proportional to 208,941.40, 313,412.10 and 51,171.40

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Solution

The fourth proportional to 208,941.40, 313,412.10 and 51,171.40 is: 76,757.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,941.40 : 313,412.10 = 51,171.40 : x
  2. Step 2: Convert to fraction form
    208,941.40/313,412.10 = 51,171.40/x
  3. Step 3: Cross multiply
    208,941.40x = 313,412.10 × 51,171.40
  4. Step 4: Simplify right side
    208,941.40x = 16,037,735,933.94
  5. Step 5: Solve for x
    x = 16,037,735,933.94/208,941.40
  6. Step 6: Final answer
    x = 76,757.10

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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.