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Finding the Fourth Proportional to 66,990.72, 92,446.92 and 36,776.58

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Solution

The fourth proportional to 66,990.72, 92,446.92 and 36,776.58 is: 50,751.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,990.72 : 92,446.92 = 36,776.58 : x
  2. Step 2: Convert to fraction form
    66,990.72/92,446.92 = 36,776.58/x
  3. Step 3: Cross multiply
    66,990.72x = 92,446.92 × 36,776.58
  4. Step 4: Simplify right side
    66,990.72x = 3,399,881,549.13
  5. Step 5: Solve for x
    x = 3,399,881,549.13/66,990.72
  6. Step 6: Final answer
    x = 50,751.53

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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.