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Finding the Fourth Proportional to 56,800.78, 85,201.16 and 15,247.78

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Solution

The fourth proportional to 56,800.78, 85,201.16 and 15,247.78 is: 22,871.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,800.78 : 85,201.16 = 15,247.78 : x
  2. Step 2: Convert to fraction form
    56,800.78/85,201.16 = 15,247.78/x
  3. Step 3: Cross multiply
    56,800.78x = 85,201.16 × 15,247.78
  4. Step 4: Simplify right side
    56,800.78x = 1,299,128,197.75
  5. Step 5: Solve for x
    x = 1,299,128,197.75/56,800.78
  6. Step 6: Final answer
    x = 22,871.66

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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.