Home / 65,845.44-90,868.10-38,978.15

Finding the Fourth Proportional to 65,845.44, 90,868.10 and 38,978.15

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Solution

The fourth proportional to 65,845.44, 90,868.10 and 38,978.15 is: 53,790.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,845.44 : 90,868.10 = 38,978.15 : x
  2. Step 2: Convert to fraction form
    65,845.44/90,868.10 = 38,978.15/x
  3. Step 3: Cross multiply
    65,845.44x = 90,868.10 × 38,978.15
  4. Step 4: Simplify right side
    65,845.44x = 3,541,869,782.78
  5. Step 5: Solve for x
    x = 3,541,869,782.78/65,845.44
  6. Step 6: Final answer
    x = 53,790.66

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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.