Home / 80,720.29-120,975.13-50,312.86

Finding the Fourth Proportional to 80,720.29, 120,975.13 and 50,312.86

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Solution

The fourth proportional to 80,720.29, 120,975.13 and 50,312.86 is: 75,403.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,720.29 : 120,975.13 = 50,312.86 : x
  2. Step 2: Convert to fraction form
    80,720.29/120,975.13 = 50,312.86/x
  3. Step 3: Cross multiply
    80,720.29x = 120,975.13 × 50,312.86
  4. Step 4: Simplify right side
    80,720.29x = 6,086,604,779.17
  5. Step 5: Solve for x
    x = 6,086,604,779.17/80,720.29
  6. Step 6: Final answer
    x = 75,403.65

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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.