Home / 141,785.32-195,663.60-78,123.12

Finding the Fourth Proportional to 141,785.32, 195,663.60 and 78,123.12

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Solution

The fourth proportional to 141,785.32, 195,663.60 and 78,123.12 is: 107,809.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,785.32 : 195,663.60 = 78,123.12 : x
  2. Step 2: Convert to fraction form
    141,785.32/195,663.60 = 78,123.12/x
  3. Step 3: Cross multiply
    141,785.32x = 195,663.60 × 78,123.12
  4. Step 4: Simplify right side
    141,785.32x = 15,285,850,902.43
  5. Step 5: Solve for x
    x = 15,285,850,902.43/141,785.32
  6. Step 6: Final answer
    x = 107,809.83

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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.