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Finding the Fourth Proportional to 118,697.80, 178,046.70 and 56,489.80

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Solution

The fourth proportional to 118,697.80, 178,046.70 and 56,489.80 is: 84,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,697.80 : 178,046.70 = 56,489.80 : x
  2. Step 2: Convert to fraction form
    118,697.80/178,046.70 = 56,489.80/x
  3. Step 3: Cross multiply
    118,697.80x = 178,046.70 × 56,489.80
  4. Step 4: Simplify right side
    118,697.80x = 10,057,822,473.66
  5. Step 5: Solve for x
    x = 10,057,822,473.66/118,697.80
  6. Step 6: Final answer
    x = 84,734.70

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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.