Home / 86,851.20-130,287.31-30,679.81

Finding the Fourth Proportional to 86,851.20, 130,287.31 and 30,679.81

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Solution

The fourth proportional to 86,851.20, 130,287.31 and 30,679.81 is: 46,023.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,851.20 : 130,287.31 = 30,679.81 : x
  2. Step 2: Convert to fraction form
    86,851.20/130,287.31 = 30,679.81/x
  3. Step 3: Cross multiply
    86,851.20x = 130,287.31 × 30,679.81
  4. Step 4: Simplify right side
    86,851.20x = 3,997,190,066.99
  5. Step 5: Solve for x
    x = 3,997,190,066.99/86,851.20
  6. Step 6: Final answer
    x = 46,023.43

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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.