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Finding the Fourth Proportional to 136,989.39, 189,044.70 and 76,559.97

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Solution

The fourth proportional to 136,989.39, 189,044.70 and 76,559.97 is: 105,652.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,989.39 : 189,044.70 = 76,559.97 : x
  2. Step 2: Convert to fraction form
    136,989.39/189,044.70 = 76,559.97/x
  3. Step 3: Cross multiply
    136,989.39x = 189,044.70 × 76,559.97
  4. Step 4: Simplify right side
    136,989.39x = 14,473,256,560.66
  5. Step 5: Solve for x
    x = 14,473,256,560.66/136,989.39
  6. Step 6: Final answer
    x = 105,652.39

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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.