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Finding the Fourth Proportional to 74,403.91, 102,678.15 and 40,412.73

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Solution

The fourth proportional to 74,403.91, 102,678.15 and 40,412.73 is: 55,769.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,403.91 : 102,678.15 = 40,412.73 : x
  2. Step 2: Convert to fraction form
    74,403.91/102,678.15 = 40,412.73/x
  3. Step 3: Cross multiply
    74,403.91x = 102,678.15 × 40,412.73
  4. Step 4: Simplify right side
    74,403.91x = 4,149,504,352.85
  5. Step 5: Solve for x
    x = 4,149,504,352.85/74,403.91
  6. Step 6: Final answer
    x = 55,769.98

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1.5x scale

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.