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Finding the Fourth Proportional to 129,078.56, 178,078.50 and 95,167.51

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Solution

The fourth proportional to 129,078.56, 178,078.50 and 95,167.51 is: 131,294.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,078.56 : 178,078.50 = 95,167.51 : x
  2. Step 2: Convert to fraction form
    129,078.56/178,078.50 = 95,167.51/x
  3. Step 3: Cross multiply
    129,078.56x = 178,078.50 × 95,167.51
  4. Step 4: Simplify right side
    129,078.56x = 16,947,286,984.34
  5. Step 5: Solve for x
    x = 16,947,286,984.34/129,078.56
  6. Step 6: Final answer
    x = 131,294.36

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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.