Home / 219,811.81-303,343.75-129,179.80

Finding the Fourth Proportional to 219,811.81, 303,343.75 and 129,179.80

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Solution

The fourth proportional to 219,811.81, 303,343.75 and 129,179.80 is: 178,270.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,811.81 : 303,343.75 = 129,179.80 : x
  2. Step 2: Convert to fraction form
    219,811.81/303,343.75 = 129,179.80/x
  3. Step 3: Cross multiply
    219,811.81x = 303,343.75 × 129,179.80
  4. Step 4: Simplify right side
    219,811.81x = 39,185,884,956.25
  5. Step 5: Solve for x
    x = 39,185,884,956.25/219,811.81
  6. Step 6: Final answer
    x = 178,270.15

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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.