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Finding the Fourth Proportional to 78,830,809.92, 108,795,696.08 and 65,576,572.97

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Solution

The fourth proportional to 78,830,809.92, 108,795,696.08 and 65,576,572.97 is: 90,503,305.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,830,809.92 : 108,795,696.08 = 65,576,572.97 : x
  2. Step 2: Convert to fraction form
    78,830,809.92/108,795,696.08 = 65,576,572.97/x
  3. Step 3: Cross multiply
    78,830,809.92x = 108,795,696.08 × 65,576,572.97
  4. Step 4: Simplify right side
    78,830,809.92x = 7,134,448,901,940,202
  5. Step 5: Solve for x
    x = 7,134,448,901,940,202/78,830,809.92
  6. Step 6: Final answer
    x = 90,503,305.87

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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.