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Finding the Fourth Proportional to 117,489.78, 176,285.40 and 42,620.54

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Solution

The fourth proportional to 117,489.78, 176,285.40 and 42,620.54 is: 63,949.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,489.78 : 176,285.40 = 42,620.54 : x
  2. Step 2: Convert to fraction form
    117,489.78/176,285.40 = 42,620.54/x
  3. Step 3: Cross multiply
    117,489.78x = 176,285.40 × 42,620.54
  4. Step 4: Simplify right side
    117,489.78x = 7,513,378,942.12
  5. Step 5: Solve for x
    x = 7,513,378,942.12/117,489.78
  6. Step 6: Final answer
    x = 63,949.21

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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.