Home / 118,979.20-178,412.28-69,074.64

Finding the Fourth Proportional to 118,979.20, 178,412.28 and 69,074.64

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Solution

The fourth proportional to 118,979.20, 178,412.28 and 69,074.64 is: 103,579.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,979.20 : 178,412.28 = 69,074.64 : x
  2. Step 2: Convert to fraction form
    118,979.20/178,412.28 = 69,074.64/x
  3. Step 3: Cross multiply
    118,979.20x = 178,412.28 × 69,074.64
  4. Step 4: Simplify right side
    118,979.20x = 12,323,764,012.58
  5. Step 5: Solve for x
    x = 12,323,764,012.58/118,979.20
  6. Step 6: Final answer
    x = 103,579.15

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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.