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Finding the Fourth Proportional to 66,092.20, 99,080.70 and 39,807.40

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Solution

The fourth proportional to 66,092.20, 99,080.70 and 39,807.40 is: 59,676.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,092.20 : 99,080.70 = 39,807.40 : x
  2. Step 2: Convert to fraction form
    66,092.20/99,080.70 = 39,807.40/x
  3. Step 3: Cross multiply
    66,092.20x = 99,080.70 × 39,807.40
  4. Step 4: Simplify right side
    66,092.20x = 3,944,145,057.18
  5. Step 5: Solve for x
    x = 3,944,145,057.18/66,092.20
  6. Step 6: Final answer
    x = 59,676.41

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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.