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Finding the Fourth Proportional to 127,809.20, 191,713.80 and 64,823.60

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Solution

The fourth proportional to 127,809.20, 191,713.80 and 64,823.60 is: 97,235.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,809.20 : 191,713.80 = 64,823.60 : x
  2. Step 2: Convert to fraction form
    127,809.20/191,713.80 = 64,823.60/x
  3. Step 3: Cross multiply
    127,809.20x = 191,713.80 × 64,823.60
  4. Step 4: Simplify right side
    127,809.20x = 12,427,578,685.68
  5. Step 5: Solve for x
    x = 12,427,578,685.68/127,809.20
  6. Step 6: Final answer
    x = 97,235.40

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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.