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Finding the Fourth Proportional to 56,867.64, 85,256.51 and 28,389.98

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Solution

The fourth proportional to 56,867.64, 85,256.51 and 28,389.98 is: 42,562.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,867.64 : 85,256.51 = 28,389.98 : x
  2. Step 2: Convert to fraction form
    56,867.64/85,256.51 = 28,389.98/x
  3. Step 3: Cross multiply
    56,867.64x = 85,256.51 × 28,389.98
  4. Step 4: Simplify right side
    56,867.64x = 2,420,430,684.96
  5. Step 5: Solve for x
    x = 2,420,430,684.96/56,867.64
  6. Step 6: Final answer
    x = 42,562.53

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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.