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Finding the Fourth Proportional to 207,986.80, 312,030.60 and 60,242.80

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Solution

The fourth proportional to 207,986.80, 312,030.60 and 60,242.80 is: 90,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,986.80 : 312,030.60 = 60,242.80 : x
  2. Step 2: Convert to fraction form
    207,986.80/312,030.60 = 60,242.80/x
  3. Step 3: Cross multiply
    207,986.80x = 312,030.60 × 60,242.80
  4. Step 4: Simplify right side
    207,986.80x = 18,797,597,029.68
  5. Step 5: Solve for x
    x = 18,797,597,029.68/207,986.80
  6. Step 6: Final answer
    x = 90,378.80

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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.