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Finding the Fourth Proportional to 72,357.09, 108,702.51 and 69,367.80

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Solution

The fourth proportional to 72,357.09, 108,702.51 and 69,367.80 is: 104,211.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,357.09 : 108,702.51 = 69,367.80 : x
  2. Step 2: Convert to fraction form
    72,357.09/108,702.51 = 69,367.80/x
  3. Step 3: Cross multiply
    72,357.09x = 108,702.51 × 69,367.80
  4. Step 4: Simplify right side
    72,357.09x = 7,540,453,973.18
  5. Step 5: Solve for x
    x = 7,540,453,973.18/72,357.09
  6. Step 6: Final answer
    x = 104,211.68

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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.