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Finding the Fourth Proportional to 171,232.40, 257,140.20 and 121,660.40

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Solution

The fourth proportional to 171,232.40, 257,140.20 and 121,660.40 is: 182,697.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,232.40 : 257,140.20 = 121,660.40 : x
  2. Step 2: Convert to fraction form
    171,232.40/257,140.20 = 121,660.40/x
  3. Step 3: Cross multiply
    171,232.40x = 257,140.20 × 121,660.40
  4. Step 4: Simplify right side
    171,232.40x = 31,283,779,588.08
  5. Step 5: Solve for x
    x = 31,283,779,588.08/171,232.40
  6. Step 6: Final answer
    x = 182,697.78

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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.