Home / 141,869.21-195,780.87-78,209.28

Finding the Fourth Proportional to 141,869.21, 195,780.87 and 78,209.28

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Solution

The fourth proportional to 141,869.21, 195,780.87 and 78,209.28 is: 107,929.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,869.21 : 195,780.87 = 78,209.28 : x
  2. Step 2: Convert to fraction form
    141,869.21/195,780.87 = 78,209.28/x
  3. Step 3: Cross multiply
    141,869.21x = 195,780.87 × 78,209.28
  4. Step 4: Simplify right side
    141,869.21x = 15,311,880,880.47
  5. Step 5: Solve for x
    x = 15,311,880,880.47/141,869.21
  6. Step 6: Final answer
    x = 107,929.56

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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.