Home / 138,945.51-191,742.30-78,514.86

Finding the Fourth Proportional to 138,945.51, 191,742.30 and 78,514.86

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Solution

The fourth proportional to 138,945.51, 191,742.30 and 78,514.86 is: 108,349.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,945.51 : 191,742.30 = 78,514.86 : x
  2. Step 2: Convert to fraction form
    138,945.51/191,742.30 = 78,514.86/x
  3. Step 3: Cross multiply
    138,945.51x = 191,742.30 × 78,514.86
  4. Step 4: Simplify right side
    138,945.51x = 15,054,619,840.58
  5. Step 5: Solve for x
    x = 15,054,619,840.58/138,945.51
  6. Step 6: Final answer
    x = 108,349.09

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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.