Home / 103,128.81-154,693.34-28,249.60

Finding the Fourth Proportional to 103,128.81, 154,693.34 and 28,249.60

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Solution

The fourth proportional to 103,128.81, 154,693.34 and 28,249.60 is: 42,374.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,128.81 : 154,693.34 = 28,249.60 : x
  2. Step 2: Convert to fraction form
    103,128.81/154,693.34 = 28,249.60/x
  3. Step 3: Cross multiply
    103,128.81x = 154,693.34 × 28,249.60
  4. Step 4: Simplify right side
    103,128.81x = 4,370,025,496.39
  5. Step 5: Solve for x
    x = 4,370,025,496.39/103,128.81
  6. Step 6: Final answer
    x = 42,374.44

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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.