Home / 115,945.40-173,874.90-80,780.60

Finding the Fourth Proportional to 115,945.40, 173,874.90 and 80,780.60

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Solution

The fourth proportional to 115,945.40, 173,874.90 and 80,780.60 is: 121,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,945.40 : 173,874.90 = 80,780.60 : x
  2. Step 2: Convert to fraction form
    115,945.40/173,874.90 = 80,780.60/x
  3. Step 3: Cross multiply
    115,945.40x = 173,874.90 × 80,780.60
  4. Step 4: Simplify right side
    115,945.40x = 14,045,718,746.94
  5. Step 5: Solve for x
    x = 14,045,718,746.94/115,945.40
  6. Step 6: Final answer
    x = 121,140.80

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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.