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Finding the Fourth Proportional to 66,273.60, 99,412.80 and 19,531.20

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Solution

The fourth proportional to 66,273.60, 99,412.80 and 19,531.20 is: 29,297.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,273.60 : 99,412.80 = 19,531.20 : x
  2. Step 2: Convert to fraction form
    66,273.60/99,412.80 = 19,531.20/x
  3. Step 3: Cross multiply
    66,273.60x = 99,412.80 × 19,531.20
  4. Step 4: Simplify right side
    66,273.60x = 1,941,651,279.36
  5. Step 5: Solve for x
    x = 1,941,651,279.36/66,273.60
  6. Step 6: Final answer
    x = 29,297.51

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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.