Home / 210,622.21-290,658.63-115,129.29

Finding the Fourth Proportional to 210,622.21, 290,658.63 and 115,129.29

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Solution

The fourth proportional to 210,622.21, 290,658.63 and 115,129.29 is: 158,878.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,622.21 : 290,658.63 = 115,129.29 : x
  2. Step 2: Convert to fraction form
    210,622.21/290,658.63 = 115,129.29/x
  3. Step 3: Cross multiply
    210,622.21x = 290,658.63 × 115,129.29
  4. Step 4: Simplify right side
    210,622.21x = 33,463,321,704.27
  5. Step 5: Solve for x
    x = 33,463,321,704.27/210,622.21
  6. Step 6: Final answer
    x = 158,878.41

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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.