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Finding the Fourth Proportional to 136,347.81, 188,167.73 and 81,916.63

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Solution

The fourth proportional to 136,347.81, 188,167.73 and 81,916.63 is: 113,049.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,347.81 : 188,167.73 = 81,916.63 : x
  2. Step 2: Convert to fraction form
    136,347.81/188,167.73 = 81,916.63/x
  3. Step 3: Cross multiply
    136,347.81x = 188,167.73 × 81,916.63
  4. Step 4: Simplify right side
    136,347.81x = 15,414,066,316.35
  5. Step 5: Solve for x
    x = 15,414,066,316.35/136,347.81
  6. Step 6: Final answer
    x = 113,049.61

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1.5x scale

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.