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Finding the Fourth Proportional to 93,839.64, 129,493.92 and 51,390

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Solution

The fourth proportional to 93,839.64, 129,493.92 and 51,390 is: 70,915.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,839.64 : 129,493.92 = 51,390 : x
  2. Step 2: Convert to fraction form
    93,839.64/129,493.92 = 51,390/x
  3. Step 3: Cross multiply
    93,839.64x = 129,493.92 × 51,390
  4. Step 4: Simplify right side
    93,839.64x = 6,654,692,548.80
  5. Step 5: Solve for x
    x = 6,654,692,548.80/93,839.64
  6. Step 6: Final answer
    x = 70,915.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.