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Finding the Fourth Proportional to 225,284.48, 310,891.75 and 121,918.47

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Solution

The fourth proportional to 225,284.48, 310,891.75 and 121,918.47 is: 168,247.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,284.48 : 310,891.75 = 121,918.47 : x
  2. Step 2: Convert to fraction form
    225,284.48/310,891.75 = 121,918.47/x
  3. Step 3: Cross multiply
    225,284.48x = 310,891.75 × 121,918.47
  4. Step 4: Simplify right side
    225,284.48x = 37,903,446,495.62
  5. Step 5: Solve for x
    x = 37,903,446,495.62/225,284.48
  6. Step 6: Final answer
    x = 168,247.04

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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.