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Finding the Fourth Proportional to 118,915.81, 178,392.17 and 40,023.88

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Solution

The fourth proportional to 118,915.81, 178,392.17 and 40,023.88 is: 60,042.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,915.81 : 178,392.17 = 40,023.88 : x
  2. Step 2: Convert to fraction form
    118,915.81/178,392.17 = 40,023.88/x
  3. Step 3: Cross multiply
    118,915.81x = 178,392.17 × 40,023.88
  4. Step 4: Simplify right side
    118,915.81x = 7,139,946,805.02
  5. Step 5: Solve for x
    x = 7,139,946,805.02/118,915.81
  6. Step 6: Final answer
    x = 60,042.03

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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.