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Finding the Fourth Proportional to 74,042.10, 110,739.15 and 66,201.30

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Solution

The fourth proportional to 74,042.10, 110,739.15 and 66,201.30 is: 99,012.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,042.10 : 110,739.15 = 66,201.30 : x
  2. Step 2: Convert to fraction form
    74,042.10/110,739.15 = 66,201.30/x
  3. Step 3: Cross multiply
    74,042.10x = 110,739.15 × 66,201.30
  4. Step 4: Simplify right side
    74,042.10x = 7,331,075,690.90
  5. Step 5: Solve for x
    x = 7,331,075,690.90/74,042.10
  6. Step 6: Final answer
    x = 99,012.26

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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.