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Finding the Fourth Proportional to 66,228.42, 99,343.80 and 28,788.51

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Solution

The fourth proportional to 66,228.42, 99,343.80 and 28,788.51 is: 43,183.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,228.42 : 99,343.80 = 28,788.51 : x
  2. Step 2: Convert to fraction form
    66,228.42/99,343.80 = 28,788.51/x
  3. Step 3: Cross multiply
    66,228.42x = 99,343.80 × 28,788.51
  4. Step 4: Simplify right side
    66,228.42x = 2,859,959,979.74
  5. Step 5: Solve for x
    x = 2,859,959,979.74/66,228.42
  6. Step 6: Final answer
    x = 43,183.27

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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.