Home / 138,726.54-191,339.64-84,278.43

Finding the Fourth Proportional to 138,726.54, 191,339.64 and 84,278.43

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Solution

The fourth proportional to 138,726.54, 191,339.64 and 84,278.43 is: 116,241.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,726.54 : 191,339.64 = 84,278.43 : x
  2. Step 2: Convert to fraction form
    138,726.54/191,339.64 = 84,278.43/x
  3. Step 3: Cross multiply
    138,726.54x = 191,339.64 × 84,278.43
  4. Step 4: Simplify right side
    138,726.54x = 16,125,804,455.97
  5. Step 5: Solve for x
    x = 16,125,804,455.97/138,726.54
  6. Step 6: Final answer
    x = 116,241.67

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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.