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Finding the Fourth Proportional to 171,440.40, 257,452.20 and 127,117.20

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Solution

The fourth proportional to 171,440.40, 257,452.20 and 127,117.20 is: 190,892.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,440.40 : 257,452.20 = 127,117.20 : x
  2. Step 2: Convert to fraction form
    171,440.40/257,452.20 = 127,117.20/x
  3. Step 3: Cross multiply
    171,440.40x = 257,452.20 × 127,117.20
  4. Step 4: Simplify right side
    171,440.40x = 32,726,602,797.84
  5. Step 5: Solve for x
    x = 32,726,602,797.84/171,440.40
  6. Step 6: Final answer
    x = 190,892.01

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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.