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Finding the Fourth Proportional to 136,553.30, 188,457.54 and 76,133.78

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Solution

The fourth proportional to 136,553.30, 188,457.54 and 76,133.78 is: 105,072.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,553.30 : 188,457.54 = 76,133.78 : x
  2. Step 2: Convert to fraction form
    136,553.30/188,457.54 = 76,133.78/x
  3. Step 3: Cross multiply
    136,553.30x = 188,457.54 × 76,133.78
  4. Step 4: Simplify right side
    136,553.30x = 14,347,984,889.70
  5. Step 5: Solve for x
    x = 14,347,984,889.70/136,553.30
  6. Step 6: Final answer
    x = 105,072.41

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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.