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Finding the Fourth Proportional to 207,983.40, 312,009.60 and 73,012.48

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Solution

The fourth proportional to 207,983.40, 312,009.60 and 73,012.48 is: 109,530.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,983.40 : 312,009.60 = 73,012.48 : x
  2. Step 2: Convert to fraction form
    207,983.40/312,009.60 = 73,012.48/x
  3. Step 3: Cross multiply
    207,983.40x = 312,009.60 × 73,012.48
  4. Step 4: Simplify right side
    207,983.40x = 22,780,594,679.81
  5. Step 5: Solve for x
    x = 22,780,594,679.81/207,983.40
  6. Step 6: Final answer
    x = 109,530.83

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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.