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Finding the Fourth Proportional to 256,208.88, 384,298.08 and 78,717.60

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Solution

The fourth proportional to 256,208.88, 384,298.08 and 78,717.60 is: 118,071.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,208.88 : 384,298.08 = 78,717.60 : x
  2. Step 2: Convert to fraction form
    256,208.88/384,298.08 = 78,717.60/x
  3. Step 3: Cross multiply
    256,208.88x = 384,298.08 × 78,717.60
  4. Step 4: Simplify right side
    256,208.88x = 30,251,022,542.21
  5. Step 5: Solve for x
    x = 30,251,022,542.21/256,208.88
  6. Step 6: Final answer
    x = 118,071.72

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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.