Home / 56,723.28-78,278.10-31,578.72

Finding the Fourth Proportional to 56,723.28, 78,278.10 and 31,578.72

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Solution

The fourth proportional to 56,723.28, 78,278.10 and 31,578.72 is: 43,578.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,723.28 : 78,278.10 = 31,578.72 : x
  2. Step 2: Convert to fraction form
    56,723.28/78,278.10 = 31,578.72/x
  3. Step 3: Cross multiply
    56,723.28x = 78,278.10 × 31,578.72
  4. Step 4: Simplify right side
    56,723.28x = 2,471,922,202.03
  5. Step 5: Solve for x
    x = 2,471,922,202.03/56,723.28
  6. Step 6: Final answer
    x = 43,578.62

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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.