Home / 219,821.09-303,256.80-129,136.14

Finding the Fourth Proportional to 219,821.09, 303,256.80 and 129,136.14

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Solution

The fourth proportional to 219,821.09, 303,256.80 and 129,136.14 is: 178,151.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,821.09 : 303,256.80 = 129,136.14 : x
  2. Step 2: Convert to fraction form
    219,821.09/303,256.80 = 129,136.14/x
  3. Step 3: Cross multiply
    219,821.09x = 303,256.80 × 129,136.14
  4. Step 4: Simplify right side
    219,821.09x = 39,161,412,580.75
  5. Step 5: Solve for x
    x = 39,161,412,580.75/219,821.09
  6. Step 6: Final answer
    x = 178,151.30

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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.