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Finding the Fourth Proportional to 421,122.42, 631,590.56 and 121,537.82

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Solution

The fourth proportional to 421,122.42, 631,590.56 and 121,537.82 is: 182,279.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,122.42 : 631,590.56 = 121,537.82 : x
  2. Step 2: Convert to fraction form
    421,122.42/631,590.56 = 121,537.82/x
  3. Step 3: Cross multiply
    421,122.42x = 631,590.56 × 121,537.82
  4. Step 4: Simplify right side
    421,122.42x = 76,762,139,794.98
  5. Step 5: Solve for x
    x = 76,762,139,794.98/421,122.42
  6. Step 6: Final answer
    x = 182,279.87

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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.