Home / 138,216.78-190,736.84-77,787.34

Finding the Fourth Proportional to 138,216.78, 190,736.84 and 77,787.34

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Solution

The fourth proportional to 138,216.78, 190,736.84 and 77,787.34 is: 107,345.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,216.78 : 190,736.84 = 77,787.34 : x
  2. Step 2: Convert to fraction form
    138,216.78/190,736.84 = 77,787.34/x
  3. Step 3: Cross multiply
    138,216.78x = 190,736.84 × 77,787.34
  4. Step 4: Simplify right side
    138,216.78x = 14,836,911,141.23
  5. Step 5: Solve for x
    x = 14,836,911,141.23/138,216.78
  6. Step 6: Final answer
    x = 107,345.22

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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.