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Finding the Fourth Proportional to 121,010.58, 181,491.95 and 115,009.54

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Solution

The fourth proportional to 121,010.58, 181,491.95 and 115,009.54 is: 172,491.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,010.58 : 181,491.95 = 115,009.54 : x
  2. Step 2: Convert to fraction form
    121,010.58/181,491.95 = 115,009.54/x
  3. Step 3: Cross multiply
    121,010.58x = 181,491.95 × 115,009.54
  4. Step 4: Simplify right side
    121,010.58x = 20,873,305,108.16
  5. Step 5: Solve for x
    x = 20,873,305,108.16/121,010.58
  6. Step 6: Final answer
    x = 172,491.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.