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Finding the Fourth Proportional to 268,171.28, 401,644.56 and 128,028.32

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Solution

The fourth proportional to 268,171.28, 401,644.56 and 128,028.32 is: 191,750.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,171.28 : 401,644.56 = 128,028.32 : x
  2. Step 2: Convert to fraction form
    268,171.28/401,644.56 = 128,028.32/x
  3. Step 3: Cross multiply
    268,171.28x = 401,644.56 × 128,028.32
  4. Step 4: Simplify right side
    268,171.28x = 51,421,878,253.94
  5. Step 5: Solve for x
    x = 51,421,878,253.94/268,171.28
  6. Step 6: Final answer
    x = 191,750.13

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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.