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Finding the Fourth Proportional to 79,731.80, 119,594.70 and 19,760.45

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Solution

The fourth proportional to 79,731.80, 119,594.70 and 19,760.45 is: 29,639.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,731.80 : 119,594.70 = 19,760.45 : x
  2. Step 2: Convert to fraction form
    79,731.80/119,594.70 = 19,760.45/x
  3. Step 3: Cross multiply
    79,731.80x = 119,594.70 × 19,760.45
  4. Step 4: Simplify right side
    79,731.80x = 2,363,245,089.62
  5. Step 5: Solve for x
    x = 2,363,245,089.62/79,731.80
  6. Step 6: Final answer
    x = 29,639.93

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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.