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Finding the Fourth Proportional to 118,718.64, 178,083.48 and 66,088.44

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Solution

The fourth proportional to 118,718.64, 178,083.48 and 66,088.44 is: 99,135.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,718.64 : 178,083.48 = 66,088.44 : x
  2. Step 2: Convert to fraction form
    118,718.64/178,083.48 = 66,088.44/x
  3. Step 3: Cross multiply
    118,718.64x = 178,083.48 × 66,088.44
  4. Step 4: Simplify right side
    118,718.64x = 11,769,259,382.97
  5. Step 5: Solve for x
    x = 11,769,259,382.97/118,718.64
  6. Step 6: Final answer
    x = 99,135.73

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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.