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Finding the Fourth Proportional to 65,720.51, 90,694.35 and 35,505.82

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Solution

The fourth proportional to 65,720.51, 90,694.35 and 35,505.82 is: 48,998.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,720.51 : 90,694.35 = 35,505.82 : x
  2. Step 2: Convert to fraction form
    65,720.51/90,694.35 = 35,505.82/x
  3. Step 3: Cross multiply
    65,720.51x = 90,694.35 × 35,505.82
  4. Step 4: Simplify right side
    65,720.51x = 3,220,177,266.12
  5. Step 5: Solve for x
    x = 3,220,177,266.12/65,720.51
  6. Step 6: Final answer
    x = 48,998.06

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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.