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Finding the Fourth Proportional to 61,989.52, 92,945.32 and 45,128.56

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Solution

The fourth proportional to 61,989.52, 92,945.32 and 45,128.56 is: 67,664.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,989.52 : 92,945.32 = 45,128.56 : x
  2. Step 2: Convert to fraction form
    61,989.52/92,945.32 = 45,128.56/x
  3. Step 3: Cross multiply
    61,989.52x = 92,945.32 × 45,128.56
  4. Step 4: Simplify right side
    61,989.52x = 4,194,488,450.34
  5. Step 5: Solve for x
    x = 4,194,488,450.34/61,989.52
  6. Step 6: Final answer
    x = 67,664.48

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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.