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Finding the Fourth Proportional to 65,453.88, 90,326.70 and 38,245.80

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Solution

The fourth proportional to 65,453.88, 90,326.70 and 38,245.80 is: 52,779.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,453.88 : 90,326.70 = 38,245.80 : x
  2. Step 2: Convert to fraction form
    65,453.88/90,326.70 = 38,245.80/x
  3. Step 3: Cross multiply
    65,453.88x = 90,326.70 × 38,245.80
  4. Step 4: Simplify right side
    65,453.88x = 3,454,616,902.86
  5. Step 5: Solve for x
    x = 3,454,616,902.86/65,453.88
  6. Step 6: Final answer
    x = 52,779.41

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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.