Home / 90,722,939.80-136,084,409.70-81,369,578.20

Finding the Fourth Proportional to 90,722,939.80, 136,084,409.70 and 81,369,578.20

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Solution

The fourth proportional to 90,722,939.80, 136,084,409.70 and 81,369,578.20 is: 122,054,367.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,722,939.80 : 136,084,409.70 = 81,369,578.20 : x
  2. Step 2: Convert to fraction form
    90,722,939.80/136,084,409.70 = 81,369,578.20/x
  3. Step 3: Cross multiply
    90,722,939.80x = 136,084,409.70 × 81,369,578.20
  4. Step 4: Simplify right side
    90,722,939.80x = 11,073,131,016,884,988
  5. Step 5: Solve for x
    x = 11,073,131,016,884,988/90,722,939.80
  6. Step 6: Final answer
    x = 122,054,367.30

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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.