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Finding the Fourth Proportional to 74,866.88, 111,619.22 and 66,452.40

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Solution

The fourth proportional to 74,866.88, 111,619.22 and 66,452.40 is: 99,074.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,866.88 : 111,619.22 = 66,452.40 : x
  2. Step 2: Convert to fraction form
    74,866.88/111,619.22 = 66,452.40/x
  3. Step 3: Cross multiply
    74,866.88x = 111,619.22 × 66,452.40
  4. Step 4: Simplify right side
    74,866.88x = 7,417,364,722.87
  5. Step 5: Solve for x
    x = 7,417,364,722.87/74,866.88
  6. Step 6: Final answer
    x = 99,074.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.