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Finding the Fourth Proportional to 65,326.80, 90,157.68 and 38,477.76

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Solution

The fourth proportional to 65,326.80, 90,157.68 and 38,477.76 is: 53,103.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,326.80 : 90,157.68 = 38,477.76 : x
  2. Step 2: Convert to fraction form
    65,326.80/90,157.68 = 38,477.76/x
  3. Step 3: Cross multiply
    65,326.80x = 90,157.68 × 38,477.76
  4. Step 4: Simplify right side
    65,326.80x = 3,469,065,573.20
  5. Step 5: Solve for x
    x = 3,469,065,573.20/65,326.80
  6. Step 6: Final answer
    x = 53,103.25

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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.