Home / 136,721.88-188,677.98-79,374.60

Finding the Fourth Proportional to 136,721.88, 188,677.98 and 79,374.60

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Solution

The fourth proportional to 136,721.88, 188,677.98 and 79,374.60 is: 109,537.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,721.88 : 188,677.98 = 79,374.60 : x
  2. Step 2: Convert to fraction form
    136,721.88/188,677.98 = 79,374.60/x
  3. Step 3: Cross multiply
    136,721.88x = 188,677.98 × 79,374.60
  4. Step 4: Simplify right side
    136,721.88x = 14,976,239,191.31
  5. Step 5: Solve for x
    x = 14,976,239,191.31/136,721.88
  6. Step 6: Final answer
    x = 109,537.98

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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.