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Finding the Fourth Proportional to 136,901.84, 188,912.22 and 76,464.09

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Solution

The fourth proportional to 136,901.84, 188,912.22 and 76,464.09 is: 105,513.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,901.84 : 188,912.22 = 76,464.09 : x
  2. Step 2: Convert to fraction form
    136,901.84/188,912.22 = 76,464.09/x
  3. Step 3: Cross multiply
    136,901.84x = 188,912.22 × 76,464.09
  4. Step 4: Simplify right side
    136,901.84x = 14,445,000,992.18
  5. Step 5: Solve for x
    x = 14,445,000,992.18/136,901.84
  6. Step 6: Final answer
    x = 105,513.57

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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.