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Finding the Fourth Proportional to 66,488.80, 99,490.20 and 48,992.80

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Solution

The fourth proportional to 66,488.80, 99,490.20 and 48,992.80 is: 73,310.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.80 : 99,490.20 = 48,992.80 : x
  2. Step 2: Convert to fraction form
    66,488.80/99,490.20 = 48,992.80/x
  3. Step 3: Cross multiply
    66,488.80x = 99,490.20 × 48,992.80
  4. Step 4: Simplify right side
    66,488.80x = 4,874,303,470.56
  5. Step 5: Solve for x
    x = 4,874,303,470.56/66,488.80
  6. Step 6: Final answer
    x = 73,310.14

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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.