Home / 191,154.20-263,809.59-105,128.33

Finding the Fourth Proportional to 191,154.20, 263,809.59 and 105,128.33

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Solution

The fourth proportional to 191,154.20, 263,809.59 and 105,128.33 is: 145,086.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,154.20 : 263,809.59 = 105,128.33 : x
  2. Step 2: Convert to fraction form
    191,154.20/263,809.59 = 105,128.33/x
  3. Step 3: Cross multiply
    191,154.20x = 263,809.59 × 105,128.33
  4. Step 4: Simplify right side
    191,154.20x = 27,733,859,921.41
  5. Step 5: Solve for x
    x = 27,733,859,921.41/191,154.20
  6. Step 6: Final answer
    x = 145,086.33

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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.