Home / 120,619.20-180,637.20-115,370.40

Finding the Fourth Proportional to 120,619.20, 180,637.20 and 115,370.40

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Solution

The fourth proportional to 120,619.20, 180,637.20 and 115,370.40 is: 172,776.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,619.20 : 180,637.20 = 115,370.40 : x
  2. Step 2: Convert to fraction form
    120,619.20/180,637.20 = 115,370.40/x
  3. Step 3: Cross multiply
    120,619.20x = 180,637.20 × 115,370.40
  4. Step 4: Simplify right side
    120,619.20x = 20,840,186,018.88
  5. Step 5: Solve for x
    x = 20,840,186,018.88/120,619.20
  6. Step 6: Final answer
    x = 172,776.69

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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.