Home / 103,128.93-154,693.51-28,249.72

Finding the Fourth Proportional to 103,128.93, 154,693.51 and 28,249.72

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Solution

The fourth proportional to 103,128.93, 154,693.51 and 28,249.72 is: 42,374.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,128.93 : 154,693.51 = 28,249.72 : x
  2. Step 2: Convert to fraction form
    103,128.93/154,693.51 = 28,249.72/x
  3. Step 3: Cross multiply
    103,128.93x = 154,693.51 × 28,249.72
  4. Step 4: Simplify right side
    103,128.93x = 4,370,047,701.85
  5. Step 5: Solve for x
    x = 4,370,047,701.85/103,128.93
  6. Step 6: Final answer
    x = 42,374.61

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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.