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Finding the Fourth Proportional to 321,008.70, 481,570.65 and 134,039.10

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Solution

The fourth proportional to 321,008.70, 481,570.65 and 134,039.10 is: 201,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,008.70 : 481,570.65 = 134,039.10 : x
  2. Step 2: Convert to fraction form
    321,008.70/481,570.65 = 134,039.10/x
  3. Step 3: Cross multiply
    321,008.70x = 481,570.65 × 134,039.10
  4. Step 4: Simplify right side
    321,008.70x = 64,549,296,512.42
  5. Step 5: Solve for x
    x = 64,549,296,512.42/321,008.70
  6. Step 6: Final answer
    x = 201,082.70

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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.