Home / 120,039.60-179,821.80-105,265.20

Finding the Fourth Proportional to 120,039.60, 179,821.80 and 105,265.20

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Solution

The fourth proportional to 120,039.60, 179,821.80 and 105,265.20 is: 157,689.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,039.60 : 179,821.80 = 105,265.20 : x
  2. Step 2: Convert to fraction form
    120,039.60/179,821.80 = 105,265.20/x
  3. Step 3: Cross multiply
    120,039.60x = 179,821.80 × 105,265.20
  4. Step 4: Simplify right side
    120,039.60x = 18,928,977,741.36
  5. Step 5: Solve for x
    x = 18,928,977,741.36/120,039.60
  6. Step 6: Final answer
    x = 157,689.44

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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.