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Finding the Fourth Proportional to 121,055.56, 181,581.86 and 54,448.65

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Solution

The fourth proportional to 121,055.56, 181,581.86 and 54,448.65 is: 81,672.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,055.56 : 181,581.86 = 54,448.65 : x
  2. Step 2: Convert to fraction form
    121,055.56/181,581.86 = 54,448.65/x
  3. Step 3: Cross multiply
    121,055.56x = 181,581.86 × 54,448.65
  4. Step 4: Simplify right side
    121,055.56x = 9,886,887,277.61
  5. Step 5: Solve for x
    x = 9,886,887,277.61/121,055.56
  6. Step 6: Final answer
    x = 81,672.31

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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.