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Finding the Fourth Proportional to 118,721.56, 178,082.48 and 55,612.56

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Solution

The fourth proportional to 118,721.56, 178,082.48 and 55,612.56 is: 83,418.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,721.56 : 178,082.48 = 55,612.56 : x
  2. Step 2: Convert to fraction form
    118,721.56/178,082.48 = 55,612.56/x
  3. Step 3: Cross multiply
    118,721.56x = 178,082.48 × 55,612.56
  4. Step 4: Simplify right side
    118,721.56x = 9,903,622,603.95
  5. Step 5: Solve for x
    x = 9,903,622,603.95/118,721.56
  6. Step 6: Final answer
    x = 83,418.91

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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.