Home / 285,845.30-428,629.47-86,128.46

Finding the Fourth Proportional to 285,845.30, 428,629.47 and 86,128.46

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Solution

The fourth proportional to 285,845.30, 428,629.47 and 86,128.46 is: 129,150.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,845.30 : 428,629.47 = 86,128.46 : x
  2. Step 2: Convert to fraction form
    285,845.30/428,629.47 = 86,128.46/x
  3. Step 3: Cross multiply
    285,845.30x = 428,629.47 × 86,128.46
  4. Step 4: Simplify right side
    285,845.30x = 36,917,196,161.72
  5. Step 5: Solve for x
    x = 36,917,196,161.72/285,845.30
  6. Step 6: Final answer
    x = 129,150.96

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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.