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Finding the Fourth Proportional to 74,908.80, 112,492.80 and 48,729.60

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Solution

The fourth proportional to 74,908.80, 112,492.80 and 48,729.60 is: 73,178.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,908.80 : 112,492.80 = 48,729.60 : x
  2. Step 2: Convert to fraction form
    74,908.80/112,492.80 = 48,729.60/x
  3. Step 3: Cross multiply
    74,908.80x = 112,492.80 × 48,729.60
  4. Step 4: Simplify right side
    74,908.80x = 5,481,729,146.88
  5. Step 5: Solve for x
    x = 5,481,729,146.88/74,908.80
  6. Step 6: Final answer
    x = 73,178.71

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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.