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Finding the Fourth Proportional to 65,605.65, 90,543.76 and 36,936.05

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Solution

The fourth proportional to 65,605.65, 90,543.76 and 36,936.05 is: 50,976.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,605.65 : 90,543.76 = 36,936.05 : x
  2. Step 2: Convert to fraction form
    65,605.65/90,543.76 = 36,936.05/x
  3. Step 3: Cross multiply
    65,605.65x = 90,543.76 × 36,936.05
  4. Step 4: Simplify right side
    65,605.65x = 3,344,328,301.49
  5. Step 5: Solve for x
    x = 3,344,328,301.49/65,605.65
  6. Step 6: Final answer
    x = 50,976.23

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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.