Home / 443,621.36-665,234.40-128,003.28

Finding the Fourth Proportional to 443,621.36, 665,234.40 and 128,003.28

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Solution

The fourth proportional to 443,621.36, 665,234.40 and 128,003.28 is: 191,947.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,621.36 : 665,234.40 = 128,003.28 : x
  2. Step 2: Convert to fraction form
    443,621.36/665,234.40 = 128,003.28/x
  3. Step 3: Cross multiply
    443,621.36x = 665,234.40 × 128,003.28
  4. Step 4: Simplify right side
    443,621.36x = 85,152,185,168.83
  5. Step 5: Solve for x
    x = 85,152,185,168.83/443,621.36
  6. Step 6: Final answer
    x = 191,947.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.