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Finding the Fourth Proportional to 80,640.90, 113,013.90 and 80,640.90

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Solution

The fourth proportional to 80,640.90, 113,013.90 and 80,640.90 is: 113,013.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,640.90 : 113,013.90 = 80,640.90 : x
  2. Step 2: Convert to fraction form
    80,640.90/113,013.90 = 80,640.90/x
  3. Step 3: Cross multiply
    80,640.90x = 113,013.90 × 80,640.90
  4. Step 4: Simplify right side
    80,640.90x = 9,113,542,608.51
  5. Step 5: Solve for x
    x = 9,113,542,608.51/80,640.90
  6. Step 6: Final answer
    x = 113,013.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.