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Finding the Fourth Proportional to 65,776.37, 90,749.90 and 40,256.15

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Solution

The fourth proportional to 65,776.37, 90,749.90 and 40,256.15 is: 55,540.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,776.37 : 90,749.90 = 40,256.15 : x
  2. Step 2: Convert to fraction form
    65,776.37/90,749.90 = 40,256.15/x
  3. Step 3: Cross multiply
    65,776.37x = 90,749.90 × 40,256.15
  4. Step 4: Simplify right side
    65,776.37x = 3,653,241,385.60
  5. Step 5: Solve for x
    x = 3,653,241,385.60/65,776.37
  6. Step 6: Final answer
    x = 55,540.33

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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.