Home / 138,382,388-190,936,013.44-82,616,955.20

Finding the Fourth Proportional to 138,382,388, 190,936,013.44 and 82,616,955.20

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Solution

The fourth proportional to 138,382,388, 190,936,013.44 and 82,616,955.20 is: 113,992,483.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,382,388 : 190,936,013.44 = 82,616,955.20 : x
  2. Step 2: Convert to fraction form
    138,382,388/190,936,013.44 = 82,616,955.20/x
  3. Step 3: Cross multiply
    138,382,388x = 190,936,013.44 × 82,616,955.20
  4. Step 4: Simplify right side
    138,382,388x = 15,774,552,068,439,078
  5. Step 5: Solve for x
    x = 15,774,552,068,439,078/138,382,388
  6. Step 6: Final answer
    x = 113,992,483.41

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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.