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Finding the Fourth Proportional to 56,757.69, 78,324.87 and 31,263.57

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Solution

The fourth proportional to 56,757.69, 78,324.87 and 31,263.57 is: 43,143.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,757.69 : 78,324.87 = 31,263.57 : x
  2. Step 2: Convert to fraction form
    56,757.69/78,324.87 = 31,263.57/x
  3. Step 3: Cross multiply
    56,757.69x = 78,324.87 × 31,263.57
  4. Step 4: Simplify right side
    56,757.69x = 2,448,715,055.99
  5. Step 5: Solve for x
    x = 2,448,715,055.99/56,757.69
  6. Step 6: Final answer
    x = 43,143.32

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1.5x scale

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.