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Finding the Fourth Proportional to 65,403.28, 90,193.80 and 41,487.40

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Solution

The fourth proportional to 65,403.28, 90,193.80 and 41,487.40 is: 57,212.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,403.28 : 90,193.80 = 41,487.40 : x
  2. Step 2: Convert to fraction form
    65,403.28/90,193.80 = 41,487.40/x
  3. Step 3: Cross multiply
    65,403.28x = 90,193.80 × 41,487.40
  4. Step 4: Simplify right side
    65,403.28x = 3,741,906,258.12
  5. Step 5: Solve for x
    x = 3,741,906,258.12/65,403.28
  6. Step 6: Final answer
    x = 57,212.82

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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.