Home / 118,739.76-178,115.12-66,109.62

Finding the Fourth Proportional to 118,739.76, 178,115.12 and 66,109.62

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Solution

The fourth proportional to 118,739.76, 178,115.12 and 66,109.62 is: 99,167.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,739.76 : 178,115.12 = 66,109.62 : x
  2. Step 2: Convert to fraction form
    118,739.76/178,115.12 = 66,109.62/x
  3. Step 3: Cross multiply
    118,739.76x = 178,115.12 × 66,109.62
  4. Step 4: Simplify right side
    118,739.76x = 11,775,122,899.45
  5. Step 5: Solve for x
    x = 11,775,122,899.45/118,739.76
  6. Step 6: Final answer
    x = 99,167.48

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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.