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Finding the Fourth Proportional to 73,990.92, 110,985.69 and 31,900.74

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Solution

The fourth proportional to 73,990.92, 110,985.69 and 31,900.74 is: 47,850.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,990.92 : 110,985.69 = 31,900.74 : x
  2. Step 2: Convert to fraction form
    73,990.92/110,985.69 = 31,900.74/x
  3. Step 3: Cross multiply
    73,990.92x = 110,985.69 × 31,900.74
  4. Step 4: Simplify right side
    73,990.92x = 3,540,525,386.83
  5. Step 5: Solve for x
    x = 3,540,525,386.83/73,990.92
  6. Step 6: Final answer
    x = 47,850.81

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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.