Home / 103,128.75-154,693.25-28,249.54

Finding the Fourth Proportional to 103,128.75, 154,693.25 and 28,249.54

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Solution

The fourth proportional to 103,128.75, 154,693.25 and 28,249.54 is: 42,374.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,128.75 : 154,693.25 = 28,249.54 : x
  2. Step 2: Convert to fraction form
    103,128.75/154,693.25 = 28,249.54/x
  3. Step 3: Cross multiply
    103,128.75x = 154,693.25 × 28,249.54
  4. Step 4: Simplify right side
    103,128.75x = 4,370,013,126.91
  5. Step 5: Solve for x
    x = 4,370,013,126.91/103,128.75
  6. Step 6: Final answer
    x = 42,374.34

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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.