Home / 231,989.15-320,129.87-136,477.40

Finding the Fourth Proportional to 231,989.15, 320,129.87 and 136,477.40

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Solution

The fourth proportional to 231,989.15, 320,129.87 and 136,477.40 is: 188,329.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,989.15 : 320,129.87 = 136,477.40 : x
  2. Step 2: Convert to fraction form
    231,989.15/320,129.87 = 136,477.40/x
  3. Step 3: Cross multiply
    231,989.15x = 320,129.87 × 136,477.40
  4. Step 4: Simplify right side
    231,989.15x = 43,690,490,036.90
  5. Step 5: Solve for x
    x = 43,690,490,036.90/231,989.15
  6. Step 6: Final answer
    x = 188,329.89

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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.