Home / 105,769.20-158,612.64-53,142

Finding the Fourth Proportional to 105,769.20, 158,612.64 and 53,142

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Solution

The fourth proportional to 105,769.20, 158,612.64 and 53,142 is: 79,692.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,769.20 : 158,612.64 = 53,142 : x
  2. Step 2: Convert to fraction form
    105,769.20/158,612.64 = 53,142/x
  3. Step 3: Cross multiply
    105,769.20x = 158,612.64 × 53,142
  4. Step 4: Simplify right side
    105,769.20x = 8,428,992,914.88
  5. Step 5: Solve for x
    x = 8,428,992,914.88/105,769.20
  6. Step 6: Final answer
    x = 79,692.32

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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.