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Finding the Fourth Proportional to 171,639.40, 257,750.70 and 127,316.20

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Solution

The fourth proportional to 171,639.40, 257,750.70 and 127,316.20 is: 191,190.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,639.40 : 257,750.70 = 127,316.20 : x
  2. Step 2: Convert to fraction form
    171,639.40/257,750.70 = 127,316.20/x
  3. Step 3: Cross multiply
    171,639.40x = 257,750.70 × 127,316.20
  4. Step 4: Simplify right side
    171,639.40x = 32,815,839,671.34
  5. Step 5: Solve for x
    x = 32,815,839,671.34/171,639.40
  6. Step 6: Final answer
    x = 191,190.60

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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.