Home / 156,747.48-216,313.11-85,128.90

Finding the Fourth Proportional to 156,747.48, 216,313.11 and 85,128.90

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Solution

The fourth proportional to 156,747.48, 216,313.11 and 85,128.90 is: 117,478.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,747.48 : 216,313.11 = 85,128.90 : x
  2. Step 2: Convert to fraction form
    156,747.48/216,313.11 = 85,128.90/x
  3. Step 3: Cross multiply
    156,747.48x = 216,313.11 × 85,128.90
  4. Step 4: Simplify right side
    156,747.48x = 18,414,497,109.88
  5. Step 5: Solve for x
    x = 18,414,497,109.88/156,747.48
  6. Step 6: Final answer
    x = 117,478.74

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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.