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Finding the Fourth Proportional to 171,420.40, 257,422.20 and 127,097.20

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Solution

The fourth proportional to 171,420.40, 257,422.20 and 127,097.20 is: 190,862.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,420.40 : 257,422.20 = 127,097.20 : x
  2. Step 2: Convert to fraction form
    171,420.40/257,422.20 = 127,097.20/x
  3. Step 3: Cross multiply
    171,420.40x = 257,422.20 × 127,097.20
  4. Step 4: Simplify right side
    171,420.40x = 32,717,640,837.84
  5. Step 5: Solve for x
    x = 32,717,640,837.84/171,420.40
  6. Step 6: Final answer
    x = 190,862.00

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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.