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Finding the Fourth Proportional to 219,775.78, 303,329.41 and 129,131.72

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Solution

The fourth proportional to 219,775.78, 303,329.41 and 129,131.72 is: 178,224.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,775.78 : 303,329.41 = 129,131.72 : x
  2. Step 2: Convert to fraction form
    219,775.78/303,329.41 = 129,131.72/x
  3. Step 3: Cross multiply
    219,775.78x = 303,329.41 × 129,131.72
  4. Step 4: Simplify right side
    219,775.78x = 39,169,447,737.89
  5. Step 5: Solve for x
    x = 39,169,447,737.89/219,775.78
  6. Step 6: Final answer
    x = 178,224.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.