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Finding the Fourth Proportional to 129,308.54, 178,344.59 and 88,496.86

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Solution

The fourth proportional to 129,308.54, 178,344.59 and 88,496.86 is: 122,056.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,308.54 : 178,344.59 = 88,496.86 : x
  2. Step 2: Convert to fraction form
    129,308.54/178,344.59 = 88,496.86/x
  3. Step 3: Cross multiply
    129,308.54x = 178,344.59 × 88,496.86
  4. Step 4: Simplify right side
    129,308.54x = 15,782,936,212.99
  5. Step 5: Solve for x
    x = 15,782,936,212.99/129,308.54
  6. Step 6: Final answer
    x = 122,056.41

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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.