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Finding the Fourth Proportional to 76,376.80, 114,565.20 and 66,535.30

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Solution

The fourth proportional to 76,376.80, 114,565.20 and 66,535.30 is: 99,802.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,376.80 : 114,565.20 = 66,535.30 : x
  2. Step 2: Convert to fraction form
    76,376.80/114,565.20 = 66,535.30/x
  3. Step 3: Cross multiply
    76,376.80x = 114,565.20 × 66,535.30
  4. Step 4: Simplify right side
    76,376.80x = 7,622,629,951.56
  5. Step 5: Solve for x
    x = 7,622,629,951.56/76,376.80
  6. Step 6: Final answer
    x = 99,802.95

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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.