Home / 76,786.20-105,957.72-42,791.40

Finding the Fourth Proportional to 76,786.20, 105,957.72 and 42,791.40

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Solution

The fourth proportional to 76,786.20, 105,957.72 and 42,791.40 is: 59,048.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,786.20 : 105,957.72 = 42,791.40 : x
  2. Step 2: Convert to fraction form
    76,786.20/105,957.72 = 42,791.40/x
  3. Step 3: Cross multiply
    76,786.20x = 105,957.72 × 42,791.40
  4. Step 4: Simplify right side
    76,786.20x = 4,534,079,179.61
  5. Step 5: Solve for x
    x = 4,534,079,179.61/76,786.20
  6. Step 6: Final answer
    x = 59,048.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.