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Finding the Fourth Proportional to 65,635.82, 90,700.04 and 53,694.80

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Solution

The fourth proportional to 65,635.82, 90,700.04 and 53,694.80 is: 74,199.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,635.82 : 90,700.04 = 53,694.80 : x
  2. Step 2: Convert to fraction form
    65,635.82/90,700.04 = 53,694.80/x
  3. Step 3: Cross multiply
    65,635.82x = 90,700.04 × 53,694.80
  4. Step 4: Simplify right side
    65,635.82x = 4,870,120,507.79
  5. Step 5: Solve for x
    x = 4,870,120,507.79/65,635.82
  6. Step 6: Final answer
    x = 74,199.13

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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.