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Finding the Fourth Proportional to 91,687.77, 137,530.90 and 28,507.77

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Solution

The fourth proportional to 91,687.77, 137,530.90 and 28,507.77 is: 42,761.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,687.77 : 137,530.90 = 28,507.77 : x
  2. Step 2: Convert to fraction form
    91,687.77/137,530.90 = 28,507.77/x
  3. Step 3: Cross multiply
    91,687.77x = 137,530.90 × 28,507.77
  4. Step 4: Simplify right side
    91,687.77x = 3,920,699,647.44
  5. Step 5: Solve for x
    x = 3,920,699,647.44/91,687.77
  6. Step 6: Final answer
    x = 42,761.42

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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.