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Finding the Fourth Proportional to 118,987.53, 178,424.28 and 69,081.41

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Solution

The fourth proportional to 118,987.53, 178,424.28 and 69,081.41 is: 103,589.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,987.53 : 178,424.28 = 69,081.41 : x
  2. Step 2: Convert to fraction form
    118,987.53/178,424.28 = 69,081.41/x
  3. Step 3: Cross multiply
    118,987.53x = 178,424.28 × 69,081.41
  4. Step 4: Simplify right side
    118,987.53x = 12,325,800,840.63
  5. Step 5: Solve for x
    x = 12,325,800,840.63/118,987.53
  6. Step 6: Final answer
    x = 103,589.01

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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.