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Finding the Fourth Proportional to 142,756.80, 213,674.40 and 131,697.60

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Solution

The fourth proportional to 142,756.80, 213,674.40 and 131,697.60 is: 197,121.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,756.80 : 213,674.40 = 131,697.60 : x
  2. Step 2: Convert to fraction form
    142,756.80/213,674.40 = 131,697.60/x
  3. Step 3: Cross multiply
    142,756.80x = 213,674.40 × 131,697.60
  4. Step 4: Simplify right side
    142,756.80x = 28,140,405,661.44
  5. Step 5: Solve for x
    x = 28,140,405,661.44/142,756.80
  6. Step 6: Final answer
    x = 197,121.30

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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.