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Finding the Fourth Proportional to 74,249.61, 111,432.74 and 40,992.63

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Solution

The fourth proportional to 74,249.61, 111,432.74 and 40,992.63 is: 61,521.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,249.61 : 111,432.74 = 40,992.63 : x
  2. Step 2: Convert to fraction form
    74,249.61/111,432.74 = 40,992.63/x
  3. Step 3: Cross multiply
    74,249.61x = 111,432.74 × 40,992.63
  4. Step 4: Simplify right side
    74,249.61x = 4,567,921,080.71
  5. Step 5: Solve for x
    x = 4,567,921,080.71/74,249.61
  6. Step 6: Final answer
    x = 61,521.15

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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.