Home / 289,621.20-434,399.76-76,410.72

Finding the Fourth Proportional to 289,621.20, 434,399.76 and 76,410.72

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Solution

The fourth proportional to 289,621.20, 434,399.76 and 76,410.72 is: 114,607.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,621.20 : 434,399.76 = 76,410.72 : x
  2. Step 2: Convert to fraction form
    289,621.20/434,399.76 = 76,410.72/x
  3. Step 3: Cross multiply
    289,621.20x = 434,399.76 × 76,410.72
  4. Step 4: Simplify right side
    289,621.20x = 33,192,798,429.43
  5. Step 5: Solve for x
    x = 33,192,798,429.43/289,621.20
  6. Step 6: Final answer
    x = 114,607.63

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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.