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Finding the Fourth Proportional to 66,653.80, 91,991.64 and 40,827.76

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Solution

The fourth proportional to 66,653.80, 91,991.64 and 40,827.76 is: 56,348.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,653.80 : 91,991.64 = 40,827.76 : x
  2. Step 2: Convert to fraction form
    66,653.80/91,991.64 = 40,827.76/x
  3. Step 3: Cross multiply
    66,653.80x = 91,991.64 × 40,827.76
  4. Step 4: Simplify right side
    66,653.80x = 3,755,812,599.93
  5. Step 5: Solve for x
    x = 3,755,812,599.93/66,653.80
  6. Step 6: Final answer
    x = 56,348.06

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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.