Home / 57,015.79-78,678.39-31,520.62

Finding the Fourth Proportional to 57,015.79, 78,678.39 and 31,520.62

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Solution

The fourth proportional to 57,015.79, 78,678.39 and 31,520.62 is: 43,496.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,015.79 : 78,678.39 = 31,520.62 : x
  2. Step 2: Convert to fraction form
    57,015.79/78,678.39 = 31,520.62/x
  3. Step 3: Cross multiply
    57,015.79x = 78,678.39 × 31,520.62
  4. Step 4: Simplify right side
    57,015.79x = 2,479,991,633.40
  5. Step 5: Solve for x
    x = 2,479,991,633.40/57,015.79
  6. Step 6: Final answer
    x = 43,496.58

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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.