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Finding the Fourth Proportional to 90,866.66, 136,321.96 and 28,537.16

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Solution

The fourth proportional to 90,866.66, 136,321.96 and 28,537.16 is: 42,812.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,866.66 : 136,321.96 = 28,537.16 : x
  2. Step 2: Convert to fraction form
    90,866.66/136,321.96 = 28,537.16/x
  3. Step 3: Cross multiply
    90,866.66x = 136,321.96 × 28,537.16
  4. Step 4: Simplify right side
    90,866.66x = 3,890,241,584.03
  5. Step 5: Solve for x
    x = 3,890,241,584.03/90,866.66
  6. Step 6: Final answer
    x = 42,812.64

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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.