Home / 57,009.75-78,679.18-31,518.05

Finding the Fourth Proportional to 57,009.75, 78,679.18 and 31,518.05

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Solution

The fourth proportional to 57,009.75, 78,679.18 and 31,518.05 is: 43,498.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,009.75 : 78,679.18 = 31,518.05 : x
  2. Step 2: Convert to fraction form
    57,009.75/78,679.18 = 31,518.05/x
  3. Step 3: Cross multiply
    57,009.75x = 78,679.18 × 31,518.05
  4. Step 4: Simplify right side
    57,009.75x = 2,479,813,975.20
  5. Step 5: Solve for x
    x = 2,479,813,975.20/57,009.75
  6. Step 6: Final answer
    x = 43,498.07

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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.