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Finding the Fourth Proportional to 256,871.70, 354,468.69 and 143,672.58

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Solution

The fourth proportional to 256,871.70, 354,468.69 and 143,672.58 is: 198,260.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,871.70 : 354,468.69 = 143,672.58 : x
  2. Step 2: Convert to fraction form
    256,871.70/354,468.69 = 143,672.58/x
  3. Step 3: Cross multiply
    256,871.70x = 354,468.69 × 143,672.58
  4. Step 4: Simplify right side
    256,871.70x = 50,927,431,221.52
  5. Step 5: Solve for x
    x = 50,927,431,221.52/256,871.70
  6. Step 6: Final answer
    x = 198,260.19

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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.