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Finding the Fourth Proportional to 90,990.86, 125,567.67 and 52,757.90

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Solution

The fourth proportional to 90,990.86, 125,567.67 and 52,757.90 is: 72,806.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,990.86 : 125,567.67 = 52,757.90 : x
  2. Step 2: Convert to fraction form
    90,990.86/125,567.67 = 52,757.90/x
  3. Step 3: Cross multiply
    90,990.86x = 125,567.67 × 52,757.90
  4. Step 4: Simplify right side
    90,990.86x = 6,624,686,577.09
  5. Step 5: Solve for x
    x = 6,624,686,577.09/90,990.86
  6. Step 6: Final answer
    x = 72,806.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.