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Finding the Fourth Proportional to 65,763.82, 90,732.65 and 40,243.55

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Solution

The fourth proportional to 65,763.82, 90,732.65 and 40,243.55 is: 55,522.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,763.82 : 90,732.65 = 40,243.55 : x
  2. Step 2: Convert to fraction form
    65,763.82/90,732.65 = 40,243.55/x
  3. Step 3: Cross multiply
    65,763.82x = 90,732.65 × 40,243.55
  4. Step 4: Simplify right side
    65,763.82x = 3,651,403,936.91
  5. Step 5: Solve for x
    x = 3,651,403,936.91/65,763.82
  6. Step 6: Final answer
    x = 55,522.99

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1.5x scale

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.