Home / 127,515.20-191,272.80-76,776.80

Finding the Fourth Proportional to 127,515.20, 191,272.80 and 76,776.80

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Solution

The fourth proportional to 127,515.20, 191,272.80 and 76,776.80 is: 115,165.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,515.20 : 191,272.80 = 76,776.80 : x
  2. Step 2: Convert to fraction form
    127,515.20/191,272.80 = 76,776.80/x
  3. Step 3: Cross multiply
    127,515.20x = 191,272.80 × 76,776.80
  4. Step 4: Simplify right side
    127,515.20x = 14,685,313,511.04
  5. Step 5: Solve for x
    x = 14,685,313,511.04/127,515.20
  6. Step 6: Final answer
    x = 115,165.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.