Home / 81,165.56-121,739.67-38,460.68

Finding the Fourth Proportional to 81,165.56, 121,739.67 and 38,460.68

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Solution

The fourth proportional to 81,165.56, 121,739.67 and 38,460.68 is: 57,686.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,165.56 : 121,739.67 = 38,460.68 : x
  2. Step 2: Convert to fraction form
    81,165.56/121,739.67 = 38,460.68/x
  3. Step 3: Cross multiply
    81,165.56x = 121,739.67 × 38,460.68
  4. Step 4: Simplify right side
    81,165.56x = 4,682,190,491.18
  5. Step 5: Solve for x
    x = 4,682,190,491.18/81,165.56
  6. Step 6: Final answer
    x = 57,686.91

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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.