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Finding the Fourth Proportional to 68,680.81, 103,005.04 and 18,749.03

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Solution

The fourth proportional to 68,680.81, 103,005.04 and 18,749.03 is: 28,119.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,680.81 : 103,005.04 = 18,749.03 : x
  2. Step 2: Convert to fraction form
    68,680.81/103,005.04 = 18,749.03/x
  3. Step 3: Cross multiply
    68,680.81x = 103,005.04 × 18,749.03
  4. Step 4: Simplify right side
    68,680.81x = 1,931,244,585.11
  5. Step 5: Solve for x
    x = 1,931,244,585.11/68,680.81
  6. Step 6: Final answer
    x = 28,119.13

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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.