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Finding the Fourth Proportional to 56,728.32, 85,144.32 and 43,537.92

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Solution

The fourth proportional to 56,728.32, 85,144.32 and 43,537.92 is: 65,346.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,728.32 : 85,144.32 = 43,537.92 : x
  2. Step 2: Convert to fraction form
    56,728.32/85,144.32 = 43,537.92/x
  3. Step 3: Cross multiply
    56,728.32x = 85,144.32 × 43,537.92
  4. Step 4: Simplify right side
    56,728.32x = 3,707,006,592.61
  5. Step 5: Solve for x
    x = 3,707,006,592.61/56,728.32
  6. Step 6: Final answer
    x = 65,346.67

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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.