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Finding the Fourth Proportional to 118,731.14, 178,116.16 and 56,380.58

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Solution

The fourth proportional to 118,731.14, 178,116.16 and 56,380.58 is: 84,580.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,731.14 : 178,116.16 = 56,380.58 : x
  2. Step 2: Convert to fraction form
    118,731.14/178,116.16 = 56,380.58/x
  3. Step 3: Cross multiply
    118,731.14x = 178,116.16 × 56,380.58
  4. Step 4: Simplify right side
    118,731.14x = 10,042,292,408.17
  5. Step 5: Solve for x
    x = 10,042,292,408.17/118,731.14
  6. Step 6: Final answer
    x = 84,580.11

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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.