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Finding the Fourth Proportional to 256,078.40, 384,117.60 and 89,883.20

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Solution

The fourth proportional to 256,078.40, 384,117.60 and 89,883.20 is: 134,824.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,078.40 : 384,117.60 = 89,883.20 : x
  2. Step 2: Convert to fraction form
    256,078.40/384,117.60 = 89,883.20/x
  3. Step 3: Cross multiply
    256,078.40x = 384,117.60 × 89,883.20
  4. Step 4: Simplify right side
    256,078.40x = 34,525,719,064.32
  5. Step 5: Solve for x
    x = 34,525,719,064.32/256,078.40
  6. Step 6: Final answer
    x = 134,824.80

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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.