Home / 72,720.07-109,081.97-20,130.01

Finding the Fourth Proportional to 72,720.07, 109,081.97 and 20,130.01

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Solution

The fourth proportional to 72,720.07, 109,081.97 and 20,130.01 is: 30,195.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,720.07 : 109,081.97 = 20,130.01 : x
  2. Step 2: Convert to fraction form
    72,720.07/109,081.97 = 20,130.01/x
  3. Step 3: Cross multiply
    72,720.07x = 109,081.97 × 20,130.01
  4. Step 4: Simplify right side
    72,720.07x = 2,195,821,146.92
  5. Step 5: Solve for x
    x = 2,195,821,146.92/72,720.07
  6. Step 6: Final answer
    x = 30,195.53

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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.