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Finding the Fourth Proportional to 62,978.85, 86,823.72 and 45,042.57

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Solution

The fourth proportional to 62,978.85, 86,823.72 and 45,042.57 is: 62,096.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,978.85 : 86,823.72 = 45,042.57 : x
  2. Step 2: Convert to fraction form
    62,978.85/86,823.72 = 45,042.57/x
  3. Step 3: Cross multiply
    62,978.85x = 86,823.72 × 45,042.57
  4. Step 4: Simplify right side
    62,978.85x = 3,910,763,485.76
  5. Step 5: Solve for x
    x = 3,910,763,485.76/62,978.85
  6. Step 6: Final answer
    x = 62,096.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.