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Finding the Fourth Proportional to 66,654.80, 91,993.02 and 40,828.76

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Solution

The fourth proportional to 66,654.80, 91,993.02 and 40,828.76 is: 56,349.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,654.80 : 91,993.02 = 40,828.76 : x
  2. Step 2: Convert to fraction form
    66,654.80/91,993.02 = 40,828.76/x
  3. Step 3: Cross multiply
    66,654.80x = 91,993.02 × 40,828.76
  4. Step 4: Simplify right side
    66,654.80x = 3,755,960,935.26
  5. Step 5: Solve for x
    x = 3,755,960,935.26/66,654.80
  6. Step 6: Final answer
    x = 56,349.44

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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.