Home / 72,782.16-109,173.29-20,191.69

Finding the Fourth Proportional to 72,782.16, 109,173.29 and 20,191.69

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Solution

The fourth proportional to 72,782.16, 109,173.29 and 20,191.69 is: 30,287.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,782.16 : 109,173.29 = 20,191.69 : x
  2. Step 2: Convert to fraction form
    72,782.16/109,173.29 = 20,191.69/x
  3. Step 3: Cross multiply
    72,782.16x = 109,173.29 × 20,191.69
  4. Step 4: Simplify right side
    72,782.16x = 2,204,393,263.47
  5. Step 5: Solve for x
    x = 2,204,393,263.47/72,782.16
  6. Step 6: Final answer
    x = 30,287.55

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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.