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Finding the Fourth Proportional to 193,448.79, 290,129.75 and 81,255.69

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Solution

The fourth proportional to 193,448.79, 290,129.75 and 81,255.69 is: 121,865.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,448.79 : 290,129.75 = 81,255.69 : x
  2. Step 2: Convert to fraction form
    193,448.79/290,129.75 = 81,255.69/x
  3. Step 3: Cross multiply
    193,448.79x = 290,129.75 × 81,255.69
  4. Step 4: Simplify right side
    193,448.79x = 23,574,692,924.21
  5. Step 5: Solve for x
    x = 23,574,692,924.21/193,448.79
  6. Step 6: Final answer
    x = 121,865.29

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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.