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Finding the Fourth Proportional to 87,192,978, 130,789,650.60 and 81,865,946.40

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Solution

The fourth proportional to 87,192,978, 130,789,650.60 and 81,865,946.40 is: 122,799,091.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,192,978 : 130,789,650.60 = 81,865,946.40 : x
  2. Step 2: Convert to fraction form
    87,192,978/130,789,650.60 = 81,865,946.40/x
  3. Step 3: Cross multiply
    87,192,978x = 130,789,650.60 × 81,865,946.40
  4. Step 4: Simplify right side
    87,192,978x = 10,707,218,525,694,328
  5. Step 5: Solve for x
    x = 10,707,218,525,694,328/87,192,978
  6. Step 6: Final answer
    x = 122,799,091.98

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