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Finding the Fourth Proportional to 69,683.76, 104,553.72 and 28,134

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Solution

The fourth proportional to 69,683.76, 104,553.72 and 28,134 is: 42,212.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,683.76 : 104,553.72 = 28,134 : x
  2. Step 2: Convert to fraction form
    69,683.76/104,553.72 = 28,134/x
  3. Step 3: Cross multiply
    69,683.76x = 104,553.72 × 28,134
  4. Step 4: Simplify right side
    69,683.76x = 2,941,514,358.48
  5. Step 5: Solve for x
    x = 2,941,514,358.48/69,683.76
  6. Step 6: Final answer
    x = 42,212.34

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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.