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Finding the Fourth Proportional to 293,138.82, 439,771.41 and 90,734.40

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Solution

The fourth proportional to 293,138.82, 439,771.41 and 90,734.40 is: 136,121.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,138.82 : 439,771.41 = 90,734.40 : x
  2. Step 2: Convert to fraction form
    293,138.82/439,771.41 = 90,734.40/x
  3. Step 3: Cross multiply
    293,138.82x = 439,771.41 × 90,734.40
  4. Step 4: Simplify right side
    293,138.82x = 39,902,395,023.50
  5. Step 5: Solve for x
    x = 39,902,395,023.50/293,138.82
  6. Step 6: Final answer
    x = 136,121.16

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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.