Home / 156,288.28-234,558.08-81,430.80

Finding the Fourth Proportional to 156,288.28, 234,558.08 and 81,430.80

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Solution

The fourth proportional to 156,288.28, 234,558.08 and 81,430.80 is: 122,211.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,288.28 : 234,558.08 = 81,430.80 : x
  2. Step 2: Convert to fraction form
    156,288.28/234,558.08 = 81,430.80/x
  3. Step 3: Cross multiply
    156,288.28x = 234,558.08 × 81,430.80
  4. Step 4: Simplify right side
    156,288.28x = 19,100,252,100.86
  5. Step 5: Solve for x
    x = 19,100,252,100.86/156,288.28
  6. Step 6: Final answer
    x = 122,211.67

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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.