Home / 191,145.23-263,820.55-121,249.31

Finding the Fourth Proportional to 191,145.23, 263,820.55 and 121,249.31

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Solution

The fourth proportional to 191,145.23, 263,820.55 and 121,249.31 is: 167,349.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,145.23 : 263,820.55 = 121,249.31 : x
  2. Step 2: Convert to fraction form
    191,145.23/263,820.55 = 121,249.31/x
  3. Step 3: Cross multiply
    191,145.23x = 263,820.55 × 121,249.31
  4. Step 4: Simplify right side
    191,145.23x = 31,988,059,651.32
  5. Step 5: Solve for x
    x = 31,988,059,651.32/191,145.23
  6. Step 6: Final answer
    x = 167,349.51

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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.