Home / 51,142.39-76,678.65-20,727.90

Finding the Fourth Proportional to 51,142.39, 76,678.65 and 20,727.90

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Solution

The fourth proportional to 51,142.39, 76,678.65 and 20,727.90 is: 31,077.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,142.39 : 76,678.65 = 20,727.90 : x
  2. Step 2: Convert to fraction form
    51,142.39/76,678.65 = 20,727.90/x
  3. Step 3: Cross multiply
    51,142.39x = 76,678.65 × 20,727.90
  4. Step 4: Simplify right side
    51,142.39x = 1,589,387,389.34
  5. Step 5: Solve for x
    x = 1,589,387,389.34/51,142.39
  6. Step 6: Final answer
    x = 31,077.69

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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.