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Finding the Fourth Proportional to 74,770.94, 103,125.56 and 47,915.95

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Solution

The fourth proportional to 74,770.94, 103,125.56 and 47,915.95 is: 66,086.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,770.94 : 103,125.56 = 47,915.95 : x
  2. Step 2: Convert to fraction form
    74,770.94/103,125.56 = 47,915.95/x
  3. Step 3: Cross multiply
    74,770.94x = 103,125.56 × 47,915.95
  4. Step 4: Simplify right side
    74,770.94x = 4,941,359,176.68
  5. Step 5: Solve for x
    x = 4,941,359,176.68/74,770.94
  6. Step 6: Final answer
    x = 66,086.63

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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.