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Finding the Fourth Proportional to 270,237.80, 405,373.43 and 90,339.42

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Solution

The fourth proportional to 270,237.80, 405,373.43 and 90,339.42 is: 135,514.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,237.80 : 405,373.43 = 90,339.42 : x
  2. Step 2: Convert to fraction form
    270,237.80/405,373.43 = 90,339.42/x
  3. Step 3: Cross multiply
    270,237.80x = 405,373.43 × 90,339.42
  4. Step 4: Simplify right side
    270,237.80x = 36,621,200,097.91
  5. Step 5: Solve for x
    x = 36,621,200,097.91/270,237.80
  6. Step 6: Final answer
    x = 135,514.72

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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.