Home / 128,304,631.80-192,079,034.10-120,830,340.60

Finding the Fourth Proportional to 128,304,631.80, 192,079,034.10 and 120,830,340.60

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Solution

The fourth proportional to 128,304,631.80, 192,079,034.10 and 120,830,340.60 is: 180,889,612.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,631.80 : 192,079,034.10 = 120,830,340.60 : x
  2. Step 2: Convert to fraction form
    128,304,631.80/192,079,034.10 = 120,830,340.60/x
  3. Step 3: Cross multiply
    128,304,631.80x = 192,079,034.10 × 120,830,340.60
  4. Step 4: Simplify right side
    128,304,631.80x = 23,208,975,112,422,012
  5. Step 5: Solve for x
    x = 23,208,975,112,422,012/128,304,631.80
  6. Step 6: Final answer
    x = 180,889,612.38

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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.