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Finding the Fourth Proportional to 65,720.57, 90,694.42 and 35,505.88

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Solution

The fourth proportional to 65,720.57, 90,694.42 and 35,505.88 is: 48,998.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,720.57 : 90,694.42 = 35,505.88 : x
  2. Step 2: Convert to fraction form
    65,720.57/90,694.42 = 35,505.88/x
  3. Step 3: Cross multiply
    65,720.57x = 90,694.42 × 35,505.88
  4. Step 4: Simplify right side
    65,720.57x = 3,220,184,877.69
  5. Step 5: Solve for x
    x = 3,220,184,877.69/65,720.57
  6. Step 6: Final answer
    x = 48,998.13

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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.