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Finding the Fourth Proportional to 436,658.63, 654,987.89 and 121,115.54

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Solution

The fourth proportional to 436,658.63, 654,987.89 and 121,115.54 is: 181,673.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,658.63 : 654,987.89 = 121,115.54 : x
  2. Step 2: Convert to fraction form
    436,658.63/654,987.89 = 121,115.54/x
  3. Step 3: Cross multiply
    436,658.63x = 654,987.89 × 121,115.54
  4. Step 4: Simplify right side
    436,658.63x = 79,329,208,715.87
  5. Step 5: Solve for x
    x = 79,329,208,715.87/436,658.63
  6. Step 6: Final answer
    x = 181,673.29

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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.