Home / 156,142.85-215,581.19-105,231.29

Finding the Fourth Proportional to 156,142.85, 215,581.19 and 105,231.29

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Solution

The fourth proportional to 156,142.85, 215,581.19 and 105,231.29 is: 145,289.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,142.85 : 215,581.19 = 105,231.29 : x
  2. Step 2: Convert to fraction form
    156,142.85/215,581.19 = 105,231.29/x
  3. Step 3: Cross multiply
    156,142.85x = 215,581.19 × 105,231.29
  4. Step 4: Simplify right side
    156,142.85x = 22,685,885,119.37
  5. Step 5: Solve for x
    x = 22,685,885,119.37/156,142.85
  6. Step 6: Final answer
    x = 145,289.30

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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.