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Finding the Fourth Proportional to 129,666, 178,939.08 and 70,050

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Solution

The fourth proportional to 129,666, 178,939.08 and 70,050 is: 96,669

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,666 : 178,939.08 = 70,050 : x
  2. Step 2: Convert to fraction form
    129,666/178,939.08 = 70,050/x
  3. Step 3: Cross multiply
    129,666x = 178,939.08 × 70,050
  4. Step 4: Simplify right side
    129,666x = 12,534,682,554
  5. Step 5: Solve for x
    x = 12,534,682,554/129,666
  6. Step 6: Final answer
    x = 96,669

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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.