Home / 100,857.20-151,269.60-30,720.20

Finding the Fourth Proportional to 100,857.20, 151,269.60 and 30,720.20

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Solution

The fourth proportional to 100,857.20, 151,269.60 and 30,720.20 is: 46,075.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,857.20 : 151,269.60 = 30,720.20 : x
  2. Step 2: Convert to fraction form
    100,857.20/151,269.60 = 30,720.20/x
  3. Step 3: Cross multiply
    100,857.20x = 151,269.60 × 30,720.20
  4. Step 4: Simplify right side
    100,857.20x = 4,647,032,365.92
  5. Step 5: Solve for x
    x = 4,647,032,365.92/100,857.20
  6. Step 6: Final answer
    x = 46,075.37

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1.5x scale

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.