Home / 129,269.14-178,348.53-105,354.70

Finding the Fourth Proportional to 129,269.14, 178,348.53 and 105,354.70

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Solution

The fourth proportional to 129,269.14, 178,348.53 and 105,354.70 is: 145,354.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,269.14 : 178,348.53 = 105,354.70 : x
  2. Step 2: Convert to fraction form
    129,269.14/178,348.53 = 105,354.70/x
  3. Step 3: Cross multiply
    129,269.14x = 178,348.53 × 105,354.70
  4. Step 4: Simplify right side
    129,269.14x = 18,789,855,873.59
  5. Step 5: Solve for x
    x = 18,789,855,873.59/129,269.14
  6. Step 6: Final answer
    x = 145,354.54

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1.5x scale

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.