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Finding the Fourth Proportional to 65,539.72, 90,443.46 and 35,731.72

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Solution

The fourth proportional to 65,539.72, 90,443.46 and 35,731.72 is: 49,309.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,539.72 : 90,443.46 = 35,731.72 : x
  2. Step 2: Convert to fraction form
    65,539.72/90,443.46 = 35,731.72/x
  3. Step 3: Cross multiply
    65,539.72x = 90,443.46 × 35,731.72
  4. Step 4: Simplify right side
    65,539.72x = 3,231,700,388.55
  5. Step 5: Solve for x
    x = 3,231,700,388.55/65,539.72
  6. Step 6: Final answer
    x = 49,309.04

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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.