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Finding the Fourth Proportional to 171,071.40, 256,898.70 and 121,499.40

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Solution

The fourth proportional to 171,071.40, 256,898.70 and 121,499.40 is: 182,456.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,071.40 : 256,898.70 = 121,499.40 : x
  2. Step 2: Convert to fraction form
    171,071.40/256,898.70 = 121,499.40/x
  3. Step 3: Cross multiply
    171,071.40x = 256,898.70 × 121,499.40
  4. Step 4: Simplify right side
    171,071.40x = 31,213,037,910.78
  5. Step 5: Solve for x
    x = 31,213,037,910.78/171,071.40
  6. Step 6: Final answer
    x = 182,456.20

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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.