Home / 156,861.36-216,468-85,240.08

Finding the Fourth Proportional to 156,861.36, 216,468 and 85,240.08

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Solution

The fourth proportional to 156,861.36, 216,468 and 85,240.08 is: 117,630.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,861.36 : 216,468 = 85,240.08 : x
  2. Step 2: Convert to fraction form
    156,861.36/216,468 = 85,240.08/x
  3. Step 3: Cross multiply
    156,861.36x = 216,468 × 85,240.08
  4. Step 4: Simplify right side
    156,861.36x = 18,451,749,637.44
  5. Step 5: Solve for x
    x = 18,451,749,637.44/156,861.36
  6. Step 6: Final answer
    x = 117,630.94

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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.