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Finding the Fourth Proportional to 65,620.78, 98,283.45 and 45,986.99

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Solution

The fourth proportional to 65,620.78, 98,283.45 and 45,986.99 is: 68,876.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,620.78 : 98,283.45 = 45,986.99 : x
  2. Step 2: Convert to fraction form
    65,620.78/98,283.45 = 45,986.99/x
  3. Step 3: Cross multiply
    65,620.78x = 98,283.45 × 45,986.99
  4. Step 4: Simplify right side
    65,620.78x = 4,519,759,556.67
  5. Step 5: Solve for x
    x = 4,519,759,556.67/65,620.78
  6. Step 6: Final answer
    x = 68,876.96

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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.