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Finding the Fourth Proportional to 129,650.09, 178,917.08 and 70,034.09

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Solution

The fourth proportional to 129,650.09, 178,917.08 and 70,034.09 is: 96,647.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,650.09 : 178,917.08 = 70,034.09 : x
  2. Step 2: Convert to fraction form
    129,650.09/178,917.08 = 70,034.09/x
  3. Step 3: Cross multiply
    129,650.09x = 178,917.08 × 70,034.09
  4. Step 4: Simplify right side
    129,650.09x = 12,530,293,638.50
  5. Step 5: Solve for x
    x = 12,530,293,638.50/129,650.09
  6. Step 6: Final answer
    x = 96,647.01

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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.