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Finding the Fourth Proportional to 171,432.40, 257,440.20 and 127,109.20

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Solution

The fourth proportional to 171,432.40, 257,440.20 and 127,109.20 is: 190,880.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,432.40 : 257,440.20 = 127,109.20 : x
  2. Step 2: Convert to fraction form
    171,432.40/257,440.20 = 127,109.20/x
  3. Step 3: Cross multiply
    171,432.40x = 257,440.20 × 127,109.20
  4. Step 4: Simplify right side
    171,432.40x = 32,723,017,869.84
  5. Step 5: Solve for x
    x = 32,723,017,869.84/171,432.40
  6. Step 6: Final answer
    x = 190,880.01

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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.