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Finding the Fourth Proportional to 219,670.74, 303,136 and 129,036

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Solution

The fourth proportional to 219,670.74, 303,136 and 129,036 is: 178,064.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,670.74 : 303,136 = 129,036 : x
  2. Step 2: Convert to fraction form
    219,670.74/303,136 = 129,036/x
  3. Step 3: Cross multiply
    219,670.74x = 303,136 × 129,036
  4. Step 4: Simplify right side
    219,670.74x = 39,115,456,896
  5. Step 5: Solve for x
    x = 39,115,456,896/219,670.74
  6. Step 6: Final answer
    x = 178,064.03

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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.