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Finding the Fourth Proportional to 51,990.67, 77,990.78 and 14,550.64

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Solution

The fourth proportional to 51,990.67, 77,990.78 and 14,550.64 is: 21,827.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,990.67 : 77,990.78 = 14,550.64 : x
  2. Step 2: Convert to fraction form
    51,990.67/77,990.78 = 14,550.64/x
  3. Step 3: Cross multiply
    51,990.67x = 77,990.78 × 14,550.64
  4. Step 4: Simplify right side
    51,990.67x = 1,134,815,763.10
  5. Step 5: Solve for x
    x = 1,134,815,763.10/51,990.67
  6. Step 6: Final answer
    x = 21,827.30

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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.