Home / 80,329.86-120,485.61-21,170.16

Finding the Fourth Proportional to 80,329.86, 120,485.61 and 21,170.16

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Solution

The fourth proportional to 80,329.86, 120,485.61 and 21,170.16 is: 31,752.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,329.86 : 120,485.61 = 21,170.16 : x
  2. Step 2: Convert to fraction form
    80,329.86/120,485.61 = 21,170.16/x
  3. Step 3: Cross multiply
    80,329.86x = 120,485.61 × 21,170.16
  4. Step 4: Simplify right side
    80,329.86x = 2,550,699,641.40
  5. Step 5: Solve for x
    x = 2,550,699,641.40/80,329.86
  6. Step 6: Final answer
    x = 31,752.82

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1.5x scale

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.