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Finding the Fourth Proportional to 136,605.58, 188,538.40 and 79,278.84

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Solution

The fourth proportional to 136,605.58, 188,538.40 and 79,278.84 is: 109,417.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,605.58 : 188,538.40 = 79,278.84 : x
  2. Step 2: Convert to fraction form
    136,605.58/188,538.40 = 79,278.84/x
  3. Step 3: Cross multiply
    136,605.58x = 188,538.40 × 79,278.84
  4. Step 4: Simplify right side
    136,605.58x = 14,947,105,647.46
  5. Step 5: Solve for x
    x = 14,947,105,647.46/136,605.58
  6. Step 6: Final answer
    x = 109,417.97

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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.