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Finding the Fourth Proportional to 65,900.58, 90,964.98 and 40,059.04

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Solution

The fourth proportional to 65,900.58, 90,964.98 and 40,059.04 is: 55,294.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,900.58 : 90,964.98 = 40,059.04 : x
  2. Step 2: Convert to fraction form
    65,900.58/90,964.98 = 40,059.04/x
  3. Step 3: Cross multiply
    65,900.58x = 90,964.98 × 40,059.04
  4. Step 4: Simplify right side
    65,900.58x = 3,643,969,772.42
  5. Step 5: Solve for x
    x = 3,643,969,772.42/65,900.58
  6. Step 6: Final answer
    x = 55,294.96

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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.