Home / 138,945,784.36-191,619,731.46-86,739,632.68

Finding the Fourth Proportional to 138,945,784.36, 191,619,731.46 and 86,739,632.68

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Solution

The fourth proportional to 138,945,784.36, 191,619,731.46 and 86,739,632.68 is: 119,622,377.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,945,784.36 : 191,619,731.46 = 86,739,632.68 : x
  2. Step 2: Convert to fraction form
    138,945,784.36/191,619,731.46 = 86,739,632.68/x
  3. Step 3: Cross multiply
    138,945,784.36x = 191,619,731.46 × 86,739,632.68
  4. Step 4: Simplify right side
    138,945,784.36x = 16,621,025,121,080,642
  5. Step 5: Solve for x
    x = 16,621,025,121,080,642/138,945,784.36
  6. Step 6: Final answer
    x = 119,622,377.88

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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.