Home / 138,394.86-190,945.40-77,944.36

Finding the Fourth Proportional to 138,394.86, 190,945.40 and 77,944.36

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Solution

The fourth proportional to 138,394.86, 190,945.40 and 77,944.36 is: 107,540.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,394.86 : 190,945.40 = 77,944.36 : x
  2. Step 2: Convert to fraction form
    138,394.86/190,945.40 = 77,944.36/x
  3. Step 3: Cross multiply
    138,394.86x = 190,945.40 × 77,944.36
  4. Step 4: Simplify right side
    138,394.86x = 14,883,116,130.86
  5. Step 5: Solve for x
    x = 14,883,116,130.86/138,394.86
  6. Step 6: Final answer
    x = 107,540.96

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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.