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Finding the Fourth Proportional to 74,908.80, 103,495.68 and 74,171.52

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Solution

The fourth proportional to 74,908.80, 103,495.68 and 74,171.52 is: 102,477.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,908.80 : 103,495.68 = 74,171.52 : x
  2. Step 2: Convert to fraction form
    74,908.80/103,495.68 = 74,171.52/x
  3. Step 3: Cross multiply
    74,908.80x = 103,495.68 × 74,171.52
  4. Step 4: Simplify right side
    74,908.80x = 7,676,431,899.03
  5. Step 5: Solve for x
    x = 7,676,431,899.03/74,908.80
  6. Step 6: Final answer
    x = 102,477.04

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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.