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Finding the Fourth Proportional to 127,859.80, 191,789.70 and 105,741.40

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Solution

The fourth proportional to 127,859.80, 191,789.70 and 105,741.40 is: 158,612.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,859.80 : 191,789.70 = 105,741.40 : x
  2. Step 2: Convert to fraction form
    127,859.80/191,789.70 = 105,741.40/x
  3. Step 3: Cross multiply
    127,859.80x = 191,789.70 × 105,741.40
  4. Step 4: Simplify right side
    127,859.80x = 20,280,111,383.58
  5. Step 5: Solve for x
    x = 20,280,111,383.58/127,859.80
  6. Step 6: Final answer
    x = 158,612.10

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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.