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Finding the Fourth Proportional to 56,745.10, 85,117.65 and 53,245.90

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Solution

The fourth proportional to 56,745.10, 85,117.65 and 53,245.90 is: 79,868.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,745.10 : 85,117.65 = 53,245.90 : x
  2. Step 2: Convert to fraction form
    56,745.10/85,117.65 = 53,245.90/x
  3. Step 3: Cross multiply
    56,745.10x = 85,117.65 × 53,245.90
  4. Step 4: Simplify right side
    56,745.10x = 4,532,165,880.14
  5. Step 5: Solve for x
    x = 4,532,165,880.14/56,745.10
  6. Step 6: Final answer
    x = 79,868.85

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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.