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Finding the Fourth Proportional to 210,053.20, 315,310.20 and 131,256.40

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Solution

The fourth proportional to 210,053.20, 315,310.20 and 131,256.40 is: 197,028.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,053.20 : 315,310.20 = 131,256.40 : x
  2. Step 2: Convert to fraction form
    210,053.20/315,310.20 = 131,256.40/x
  3. Step 3: Cross multiply
    210,053.20x = 315,310.20 × 131,256.40
  4. Step 4: Simplify right side
    210,053.20x = 41,386,481,735.28
  5. Step 5: Solve for x
    x = 41,386,481,735.28/210,053.20
  6. Step 6: Final answer
    x = 197,028.57

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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.