Home / 57,128.28-85,639.94-19,679.45

Finding the Fourth Proportional to 57,128.28, 85,639.94 and 19,679.45

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Solution

The fourth proportional to 57,128.28, 85,639.94 and 19,679.45 is: 29,501.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,128.28 : 85,639.94 = 19,679.45 : x
  2. Step 2: Convert to fraction form
    57,128.28/85,639.94 = 19,679.45/x
  3. Step 3: Cross multiply
    57,128.28x = 85,639.94 × 19,679.45
  4. Step 4: Simplify right side
    57,128.28x = 1,685,346,677.62
  5. Step 5: Solve for x
    x = 1,685,346,677.62/57,128.28
  6. Step 6: Final answer
    x = 29,501.09

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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.