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Finding the Fourth Proportional to 56,672.40, 85,005.90 and 19,228.80

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Solution

The fourth proportional to 56,672.40, 85,005.90 and 19,228.80 is: 28,842.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,672.40 : 85,005.90 = 19,228.80 : x
  2. Step 2: Convert to fraction form
    56,672.40/85,005.90 = 19,228.80/x
  3. Step 3: Cross multiply
    56,672.40x = 85,005.90 × 19,228.80
  4. Step 4: Simplify right side
    56,672.40x = 1,634,561,449.92
  5. Step 5: Solve for x
    x = 1,634,561,449.92/56,672.40
  6. Step 6: Final answer
    x = 28,842.28

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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.