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Finding the Fourth Proportional to 91,281.80, 136,935.77 and 28,107.27

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Solution

The fourth proportional to 91,281.80, 136,935.77 and 28,107.27 is: 42,164.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,281.80 : 136,935.77 = 28,107.27 : x
  2. Step 2: Convert to fraction form
    91,281.80/136,935.77 = 28,107.27/x
  3. Step 3: Cross multiply
    91,281.80x = 136,935.77 × 28,107.27
  4. Step 4: Simplify right side
    91,281.80x = 3,848,890,519.51
  5. Step 5: Solve for x
    x = 3,848,890,519.51/91,281.80
  6. Step 6: Final answer
    x = 42,164.93

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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.