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Finding the Fourth Proportional to 120,750.36, 180,889.92 and 79,071

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Solution

The fourth proportional to 120,750.36, 180,889.92 and 79,071 is: 118,452.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,750.36 : 180,889.92 = 79,071 : x
  2. Step 2: Convert to fraction form
    120,750.36/180,889.92 = 79,071/x
  3. Step 3: Cross multiply
    120,750.36x = 180,889.92 × 79,071
  4. Step 4: Simplify right side
    120,750.36x = 14,303,146,864.32
  5. Step 5: Solve for x
    x = 14,303,146,864.32/120,750.36
  6. Step 6: Final answer
    x = 118,452.21

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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.