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Finding the Fourth Proportional to 256,272.77, 384,419.66 and 87,908.88

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Solution

The fourth proportional to 256,272.77, 384,419.66 and 87,908.88 is: 131,866.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,272.77 : 384,419.66 = 87,908.88 : x
  2. Step 2: Convert to fraction form
    256,272.77/384,419.66 = 87,908.88/x
  3. Step 3: Cross multiply
    256,272.77x = 384,419.66 × 87,908.88
  4. Step 4: Simplify right side
    256,272.77x = 33,793,899,398.94
  5. Step 5: Solve for x
    x = 33,793,899,398.94/256,272.77
  6. Step 6: Final answer
    x = 131,866.92

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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.