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Finding the Fourth Proportional to 436,139.78, 654,221.88 and 120,596.58

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Solution

The fourth proportional to 436,139.78, 654,221.88 and 120,596.58 is: 180,898.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,139.78 : 654,221.88 = 120,596.58 : x
  2. Step 2: Convert to fraction form
    436,139.78/654,221.88 = 120,596.58/x
  3. Step 3: Cross multiply
    436,139.78x = 654,221.88 × 120,596.58
  4. Step 4: Simplify right side
    436,139.78x = 78,896,921,289.17
  5. Step 5: Solve for x
    x = 78,896,921,289.17/436,139.78
  6. Step 6: Final answer
    x = 180,898.25

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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.