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Finding the Fourth Proportional to 76,761.59, 115,120.51 and 48,639.20

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Solution

The fourth proportional to 76,761.59, 115,120.51 and 48,639.20 is: 72,944.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,761.59 : 115,120.51 = 48,639.20 : x
  2. Step 2: Convert to fraction form
    76,761.59/115,120.51 = 48,639.20/x
  3. Step 3: Cross multiply
    76,761.59x = 115,120.51 × 48,639.20
  4. Step 4: Simplify right side
    76,761.59x = 5,599,368,812.79
  5. Step 5: Solve for x
    x = 5,599,368,812.79/76,761.59
  6. Step 6: Final answer
    x = 72,944.93

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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.