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Finding the Fourth Proportional to 136,713.46, 188,669.10 and 79,348.48

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Solution

The fourth proportional to 136,713.46, 188,669.10 and 79,348.48 is: 109,503.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,713.46 : 188,669.10 = 79,348.48 : x
  2. Step 2: Convert to fraction form
    136,713.46/188,669.10 = 79,348.48/x
  3. Step 3: Cross multiply
    136,713.46x = 188,669.10 × 79,348.48
  4. Step 4: Simplify right side
    136,713.46x = 14,970,606,307.97
  5. Step 5: Solve for x
    x = 14,970,606,307.97/136,713.46
  6. Step 6: Final answer
    x = 109,503.53

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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.