Home / 100,678.55-138,920.97-58,228.88

Finding the Fourth Proportional to 100,678.55, 138,920.97 and 58,228.88

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Solution

The fourth proportional to 100,678.55, 138,920.97 and 58,228.88 is: 80,346.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,678.55 : 138,920.97 = 58,228.88 : x
  2. Step 2: Convert to fraction form
    100,678.55/138,920.97 = 58,228.88/x
  3. Step 3: Cross multiply
    100,678.55x = 138,920.97 × 58,228.88
  4. Step 4: Simplify right side
    100,678.55x = 8,089,212,015.37
  5. Step 5: Solve for x
    x = 8,089,212,015.37/100,678.55
  6. Step 6: Final answer
    x = 80,346.93

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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.