Home / 156,912.30-216,588.51-100,323.90

Finding the Fourth Proportional to 156,912.30, 216,588.51 and 100,323.90

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Solution

The fourth proportional to 156,912.30, 216,588.51 and 100,323.90 is: 138,478.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,912.30 : 216,588.51 = 100,323.90 : x
  2. Step 2: Convert to fraction form
    156,912.30/216,588.51 = 100,323.90/x
  3. Step 3: Cross multiply
    156,912.30x = 216,588.51 × 100,323.90
  4. Step 4: Simplify right side
    156,912.30x = 21,729,004,018.39
  5. Step 5: Solve for x
    x = 21,729,004,018.39/156,912.30
  6. Step 6: Final answer
    x = 138,478.65

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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.