Home / 127,929.70-191,894.55-85,939.30

Finding the Fourth Proportional to 127,929.70, 191,894.55 and 85,939.30

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Solution

The fourth proportional to 127,929.70, 191,894.55 and 85,939.30 is: 128,908.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,929.70 : 191,894.55 = 85,939.30 : x
  2. Step 2: Convert to fraction form
    127,929.70/191,894.55 = 85,939.30/x
  3. Step 3: Cross multiply
    127,929.70x = 191,894.55 × 85,939.30
  4. Step 4: Simplify right side
    127,929.70x = 16,491,283,300.82
  5. Step 5: Solve for x
    x = 16,491,283,300.82/127,929.70
  6. Step 6: Final answer
    x = 128,908.95

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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.