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Finding the Fourth Proportional to 208,839.40, 313,259.10 and 51,069.40

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Solution

The fourth proportional to 208,839.40, 313,259.10 and 51,069.40 is: 76,604.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,839.40 : 313,259.10 = 51,069.40 : x
  2. Step 2: Convert to fraction form
    208,839.40/313,259.10 = 51,069.40/x
  3. Step 3: Cross multiply
    208,839.40x = 313,259.10 × 51,069.40
  4. Step 4: Simplify right side
    208,839.40x = 15,997,954,281.54
  5. Step 5: Solve for x
    x = 15,997,954,281.54/208,839.40
  6. Step 6: Final answer
    x = 76,604.10

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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.