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Finding the Fourth Proportional to 118,775.66, 178,165.36 and 39,890.56

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Solution

The fourth proportional to 118,775.66, 178,165.36 and 39,890.56 is: 59,836.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,775.66 : 178,165.36 = 39,890.56 : x
  2. Step 2: Convert to fraction form
    118,775.66/178,165.36 = 39,890.56/x
  3. Step 3: Cross multiply
    118,775.66x = 178,165.36 × 39,890.56
  4. Step 4: Simplify right side
    118,775.66x = 7,107,115,983.00
  5. Step 5: Solve for x
    x = 7,107,115,983.00/118,775.66
  6. Step 6: Final answer
    x = 59,836.47

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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.