Home / 136,891,197-188,909,851.86-81,889,371.72

Finding the Fourth Proportional to 136,891,197, 188,909,851.86 and 81,889,371.72

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Solution

The fourth proportional to 136,891,197, 188,909,851.86 and 81,889,371.72 is: 113,007,332.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,891,197 : 188,909,851.86 = 81,889,371.72 : x
  2. Step 2: Convert to fraction form
    136,891,197/188,909,851.86 = 81,889,371.72/x
  3. Step 3: Cross multiply
    136,891,197x = 188,909,851.86 × 81,889,371.72
  4. Step 4: Simplify right side
    136,891,197x = 15,469,709,080,533,674
  5. Step 5: Solve for x
    x = 15,469,709,080,533,674/136,891,197
  6. Step 6: Final answer
    x = 113,007,332.97

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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.