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Finding the Fourth Proportional to 137,141.80, 205,712.70 and 113,813.80

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Solution

The fourth proportional to 137,141.80, 205,712.70 and 113,813.80 is: 170,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,141.80 : 205,712.70 = 113,813.80 : x
  2. Step 2: Convert to fraction form
    137,141.80/205,712.70 = 113,813.80/x
  3. Step 3: Cross multiply
    137,141.80x = 205,712.70 × 113,813.80
  4. Step 4: Simplify right side
    137,141.80x = 23,412,944,095.26
  5. Step 5: Solve for x
    x = 23,412,944,095.26/137,141.80
  6. Step 6: Final answer
    x = 170,720.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.