Home / 156,939.37-216,573.76-85,321.20

Finding the Fourth Proportional to 156,939.37, 216,573.76 and 85,321.20

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Solution

The fourth proportional to 156,939.37, 216,573.76 and 85,321.20 is: 117,741.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,939.37 : 216,573.76 = 85,321.20 : x
  2. Step 2: Convert to fraction form
    156,939.37/216,573.76 = 85,321.20/x
  3. Step 3: Cross multiply
    156,939.37x = 216,573.76 × 85,321.20
  4. Step 4: Simplify right side
    156,939.37x = 18,478,333,091.71
  5. Step 5: Solve for x
    x = 18,478,333,091.71/156,939.37
  6. Step 6: Final answer
    x = 117,741.86

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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.