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Finding the Fourth Proportional to 442,743.90, 664,007.85 and 127,167.90

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Solution

The fourth proportional to 442,743.90, 664,007.85 and 127,167.90 is: 190,720.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,743.90 : 664,007.85 = 127,167.90 : x
  2. Step 2: Convert to fraction form
    442,743.90/664,007.85 = 127,167.90/x
  3. Step 3: Cross multiply
    442,743.90x = 664,007.85 × 127,167.90
  4. Step 4: Simplify right side
    442,743.90x = 84,440,483,868.02
  5. Step 5: Solve for x
    x = 84,440,483,868.02/442,743.90
  6. Step 6: Final answer
    x = 190,720.83

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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.