Home / 65,538.14-90,150.45-57,431.66

Finding the Fourth Proportional to 65,538.14, 90,150.45 and 57,431.66

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Solution

The fourth proportional to 65,538.14, 90,150.45 and 57,431.66 is: 78,999.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,538.14 : 90,150.45 = 57,431.66 : x
  2. Step 2: Convert to fraction form
    65,538.14/90,150.45 = 57,431.66/x
  3. Step 3: Cross multiply
    65,538.14x = 90,150.45 × 57,431.66
  4. Step 4: Simplify right side
    65,538.14x = 5,177,489,993.25
  5. Step 5: Solve for x
    x = 5,177,489,993.25/65,538.14
  6. Step 6: Final answer
    x = 78,999.65

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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.