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Finding the Fourth Proportional to 68,851.84, 103,281.60 and 19,600

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Solution

The fourth proportional to 68,851.84, 103,281.60 and 19,600 is: 29,401.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,851.84 : 103,281.60 = 19,600 : x
  2. Step 2: Convert to fraction form
    68,851.84/103,281.60 = 19,600/x
  3. Step 3: Cross multiply
    68,851.84x = 103,281.60 × 19,600
  4. Step 4: Simplify right side
    68,851.84x = 2,024,319,360
  5. Step 5: Solve for x
    x = 2,024,319,360/68,851.84
  6. Step 6: Final answer
    x = 29,401.09

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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.