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Finding the Fourth Proportional to 171,405.80, 257,108.70 and 127,228.40

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Solution

The fourth proportional to 171,405.80, 257,108.70 and 127,228.40 is: 190,842.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,405.80 : 257,108.70 = 127,228.40 : x
  2. Step 2: Convert to fraction form
    171,405.80/257,108.70 = 127,228.40/x
  3. Step 3: Cross multiply
    171,405.80x = 257,108.70 × 127,228.40
  4. Step 4: Simplify right side
    171,405.80x = 32,711,528,527.08
  5. Step 5: Solve for x
    x = 32,711,528,527.08/171,405.80
  6. Step 6: Final answer
    x = 190,842.60

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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.