Home / 65,450.76-90,319.62-39,999.70

Finding the Fourth Proportional to 65,450.76, 90,319.62 and 39,999.70

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Solution

The fourth proportional to 65,450.76, 90,319.62 and 39,999.70 is: 55,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,450.76 : 90,319.62 = 39,999.70 : x
  2. Step 2: Convert to fraction form
    65,450.76/90,319.62 = 39,999.70/x
  3. Step 3: Cross multiply
    65,450.76x = 90,319.62 × 39,999.70
  4. Step 4: Simplify right side
    65,450.76x = 3,612,757,704.11
  5. Step 5: Solve for x
    x = 3,612,757,704.11/65,450.76
  6. Step 6: Final answer
    x = 55,198.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.