Home / 74,240.10-111,036.15-66,399.30

Finding the Fourth Proportional to 74,240.10, 111,036.15 and 66,399.30

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Solution

The fourth proportional to 74,240.10, 111,036.15 and 66,399.30 is: 99,309.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,240.10 : 111,036.15 = 66,399.30 : x
  2. Step 2: Convert to fraction form
    74,240.10/111,036.15 = 66,399.30/x
  3. Step 3: Cross multiply
    74,240.10x = 111,036.15 × 66,399.30
  4. Step 4: Simplify right side
    74,240.10x = 7,372,722,634.70
  5. Step 5: Solve for x
    x = 7,372,722,634.70/74,240.10
  6. Step 6: Final answer
    x = 99,309.17

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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.