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Finding the Fourth Proportional to 171,507.76, 257,124.25 and 81,505.30

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Solution

The fourth proportional to 171,507.76, 257,124.25 and 81,505.30 is: 122,192.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,507.76 : 257,124.25 = 81,505.30 : x
  2. Step 2: Convert to fraction form
    171,507.76/257,124.25 = 81,505.30/x
  3. Step 3: Cross multiply
    171,507.76x = 257,124.25 × 81,505.30
  4. Step 4: Simplify right side
    171,507.76x = 20,956,988,929.76
  5. Step 5: Solve for x
    x = 20,956,988,929.76/171,507.76
  6. Step 6: Final answer
    x = 122,192.66

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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.