Home / 156,409.17-215,844.31-84,789.78

Finding the Fourth Proportional to 156,409.17, 215,844.31 and 84,789.78

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Solution

The fourth proportional to 156,409.17, 215,844.31 and 84,789.78 is: 117,009.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,409.17 : 215,844.31 = 84,789.78 : x
  2. Step 2: Convert to fraction form
    156,409.17/215,844.31 = 84,789.78/x
  3. Step 3: Cross multiply
    156,409.17x = 215,844.31 × 84,789.78
  4. Step 4: Simplify right side
    156,409.17x = 18,301,391,559.15
  5. Step 5: Solve for x
    x = 18,301,391,559.15/156,409.17
  6. Step 6: Final answer
    x = 117,009.71

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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.