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Finding the Fourth Proportional to 225,583.66, 311,293.53 and 128,783.68

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Solution

The fourth proportional to 225,583.66, 311,293.53 and 128,783.68 is: 177,714.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,583.66 : 311,293.53 = 128,783.68 : x
  2. Step 2: Convert to fraction form
    225,583.66/311,293.53 = 128,783.68/x
  3. Step 3: Cross multiply
    225,583.66x = 311,293.53 × 128,783.68
  4. Step 4: Simplify right side
    225,583.66x = 40,089,526,353.59
  5. Step 5: Solve for x
    x = 40,089,526,353.59/225,583.66
  6. Step 6: Final answer
    x = 177,714.67

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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.