Home / 120,421.08-180,597.60-75,981.24

Finding the Fourth Proportional to 120,421.08, 180,597.60 and 75,981.24

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Solution

The fourth proportional to 120,421.08, 180,597.60 and 75,981.24 is: 113,950.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,421.08 : 180,597.60 = 75,981.24 : x
  2. Step 2: Convert to fraction form
    120,421.08/180,597.60 = 75,981.24/x
  3. Step 3: Cross multiply
    120,421.08x = 180,597.60 × 75,981.24
  4. Step 4: Simplify right side
    120,421.08x = 13,722,029,589.02
  5. Step 5: Solve for x
    x = 13,722,029,589.02/120,421.08
  6. Step 6: Final answer
    x = 113,950.39

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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.