Home / 55,172-76,137.36-30,021.68

Finding the Fourth Proportional to 55,172, 76,137.36 and 30,021.68

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Solution

The fourth proportional to 55,172, 76,137.36 and 30,021.68 is: 41,429.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,172 : 76,137.36 = 30,021.68 : x
  2. Step 2: Convert to fraction form
    55,172/76,137.36 = 30,021.68/x
  3. Step 3: Cross multiply
    55,172x = 76,137.36 × 30,021.68
  4. Step 4: Simplify right side
    55,172x = 2,285,771,457.96
  5. Step 5: Solve for x
    x = 2,285,771,457.96/55,172
  6. Step 6: Final answer
    x = 41,429.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.