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Finding the Fourth Proportional to 270,921.51, 406,379.30 and 81,373.68

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Solution

The fourth proportional to 270,921.51, 406,379.30 and 81,373.68 is: 122,059.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,921.51 : 406,379.30 = 81,373.68 : x
  2. Step 2: Convert to fraction form
    270,921.51/406,379.30 = 81,373.68/x
  3. Step 3: Cross multiply
    270,921.51x = 406,379.30 × 81,373.68
  4. Step 4: Simplify right side
    270,921.51x = 33,068,578,709.96
  5. Step 5: Solve for x
    x = 33,068,578,709.96/270,921.51
  6. Step 6: Final answer
    x = 122,059.63

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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.