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Finding the Fourth Proportional to 66,423.80, 99,635.70 and 27,009.20

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Solution

The fourth proportional to 66,423.80, 99,635.70 and 27,009.20 is: 40,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,423.80 : 99,635.70 = 27,009.20 : x
  2. Step 2: Convert to fraction form
    66,423.80/99,635.70 = 27,009.20/x
  3. Step 3: Cross multiply
    66,423.80x = 99,635.70 × 27,009.20
  4. Step 4: Simplify right side
    66,423.80x = 2,691,080,548.44
  5. Step 5: Solve for x
    x = 2,691,080,548.44/66,423.80
  6. Step 6: Final answer
    x = 40,513.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.