Home / 103,128.90-154,693.47-28,249.69

Finding the Fourth Proportional to 103,128.90, 154,693.47 and 28,249.69

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Solution

The fourth proportional to 103,128.90, 154,693.47 and 28,249.69 is: 42,374.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,128.90 : 154,693.47 = 28,249.69 : x
  2. Step 2: Convert to fraction form
    103,128.90/154,693.47 = 28,249.69/x
  3. Step 3: Cross multiply
    103,128.90x = 154,693.47 × 28,249.69
  4. Step 4: Simplify right side
    103,128.90x = 4,370,042,379.16
  5. Step 5: Solve for x
    x = 4,370,042,379.16/103,128.90
  6. Step 6: Final answer
    x = 42,374.57

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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.