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Finding the Fourth Proportional to 118,921.64, 178,032.53 and 79,380.68

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Solution

The fourth proportional to 118,921.64, 178,032.53 and 79,380.68 is: 118,837.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,921.64 : 178,032.53 = 79,380.68 : x
  2. Step 2: Convert to fraction form
    118,921.64/178,032.53 = 79,380.68/x
  3. Step 3: Cross multiply
    118,921.64x = 178,032.53 × 79,380.68
  4. Step 4: Simplify right side
    118,921.64x = 14,132,342,601.81
  5. Step 5: Solve for x
    x = 14,132,342,601.81/118,921.64
  6. Step 6: Final answer
    x = 118,837.44

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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.