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Finding the Fourth Proportional to 78,636.70, 108,555.42 and 50,358.52

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Solution

The fourth proportional to 78,636.70, 108,555.42 and 50,358.52 is: 69,518.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,636.70 : 108,555.42 = 50,358.52 : x
  2. Step 2: Convert to fraction form
    78,636.70/108,555.42 = 50,358.52/x
  3. Step 3: Cross multiply
    78,636.70x = 108,555.42 × 50,358.52
  4. Step 4: Simplify right side
    78,636.70x = 5,466,690,289.18
  5. Step 5: Solve for x
    x = 5,466,690,289.18/78,636.70
  6. Step 6: Final answer
    x = 69,518.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.