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Finding the Fourth Proportional to 74,187.92, 102,379.40 and 40,653.92

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Solution

The fourth proportional to 74,187.92, 102,379.40 and 40,653.92 is: 56,102.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,187.92 : 102,379.40 = 40,653.92 : x
  2. Step 2: Convert to fraction form
    74,187.92/102,379.40 = 40,653.92/x
  3. Step 3: Cross multiply
    74,187.92x = 102,379.40 × 40,653.92
  4. Step 4: Simplify right side
    74,187.92x = 4,162,123,222.08
  5. Step 5: Solve for x
    x = 4,162,123,222.08/74,187.92
  6. Step 6: Final answer
    x = 56,102.44

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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.