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Finding the Fourth Proportional to 120,172.79, 180,161.98 and 73,409.87

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Solution

The fourth proportional to 120,172.79, 180,161.98 and 73,409.87 is: 110,055.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,172.79 : 180,161.98 = 73,409.87 : x
  2. Step 2: Convert to fraction form
    120,172.79/180,161.98 = 73,409.87/x
  3. Step 3: Cross multiply
    120,172.79x = 180,161.98 × 73,409.87
  4. Step 4: Simplify right side
    120,172.79x = 13,225,667,530.74
  5. Step 5: Solve for x
    x = 13,225,667,530.74/120,172.79
  6. Step 6: Final answer
    x = 110,055.43

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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.