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Finding the Fourth Proportional to 66,422.80, 99,564.99 and 28,972.81

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Solution

The fourth proportional to 66,422.80, 99,564.99 and 28,972.81 is: 43,429.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.80 : 99,564.99 = 28,972.81 : x
  2. Step 2: Convert to fraction form
    66,422.80/99,564.99 = 28,972.81/x
  3. Step 3: Cross multiply
    66,422.80x = 99,564.99 × 28,972.81
  4. Step 4: Simplify right side
    66,422.80x = 2,884,677,537.92
  5. Step 5: Solve for x
    x = 2,884,677,537.92/66,422.80
  6. Step 6: Final answer
    x = 43,429.03

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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.