Home / 138,670.03-191,353.75-78,255.37

Finding the Fourth Proportional to 138,670.03, 191,353.75 and 78,255.37

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Solution

The fourth proportional to 138,670.03, 191,353.75 and 78,255.37 is: 107,986.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,670.03 : 191,353.75 = 78,255.37 : x
  2. Step 2: Convert to fraction form
    138,670.03/191,353.75 = 78,255.37/x
  3. Step 3: Cross multiply
    138,670.03x = 191,353.75 × 78,255.37
  4. Step 4: Simplify right side
    138,670.03x = 14,974,458,507.14
  5. Step 5: Solve for x
    x = 14,974,458,507.14/138,670.03
  6. Step 6: Final answer
    x = 107,986.26

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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.