Home / 156,745.14-215,816.64-138,329.40

Finding the Fourth Proportional to 156,745.14, 215,816.64 and 138,329.40

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Solution

The fourth proportional to 156,745.14, 215,816.64 and 138,329.40 is: 190,460.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,745.14 : 215,816.64 = 138,329.40 : x
  2. Step 2: Convert to fraction form
    156,745.14/215,816.64 = 138,329.40/x
  3. Step 3: Cross multiply
    156,745.14x = 215,816.64 × 138,329.40
  4. Step 4: Simplify right side
    156,745.14x = 29,853,786,321.22
  5. Step 5: Solve for x
    x = 29,853,786,321.22/156,745.14
  6. Step 6: Final answer
    x = 190,460.68

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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.