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Finding the Fourth Proportional to 287,169.50, 430,754.36 and 129,213.43

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Solution

The fourth proportional to 287,169.50, 430,754.36 and 129,213.43 is: 193,820.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,169.50 : 430,754.36 = 129,213.43 : x
  2. Step 2: Convert to fraction form
    287,169.50/430,754.36 = 129,213.43/x
  3. Step 3: Cross multiply
    287,169.50x = 430,754.36 × 129,213.43
  4. Step 4: Simplify right side
    287,169.50x = 55,659,246,620.10
  5. Step 5: Solve for x
    x = 55,659,246,620.10/287,169.50
  6. Step 6: Final answer
    x = 193,820.19

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1.5x scale

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.