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Finding the Fourth Proportional to 230,131.01, 317,579.78 and 128,157.68

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Solution

The fourth proportional to 230,131.01, 317,579.78 and 128,157.68 is: 176,857.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,131.01 : 317,579.78 = 128,157.68 : x
  2. Step 2: Convert to fraction form
    230,131.01/317,579.78 = 128,157.68/x
  3. Step 3: Cross multiply
    230,131.01x = 317,579.78 × 128,157.68
  4. Step 4: Simplify right side
    230,131.01x = 40,700,285,591.02
  5. Step 5: Solve for x
    x = 40,700,285,591.02/230,131.01
  6. Step 6: Final answer
    x = 176,857.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.