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Finding the Fourth Proportional to 45,480.90, 68,228.64 and 19,189.51

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Solution

The fourth proportional to 45,480.90, 68,228.64 and 19,189.51 is: 28,787.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,480.90 : 68,228.64 = 19,189.51 : x
  2. Step 2: Convert to fraction form
    45,480.90/68,228.64 = 19,189.51/x
  3. Step 3: Cross multiply
    45,480.90x = 68,228.64 × 19,189.51
  4. Step 4: Simplify right side
    45,480.90x = 1,309,274,292.16
  5. Step 5: Solve for x
    x = 1,309,274,292.16/45,480.90
  6. Step 6: Final answer
    x = 28,787.35

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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.