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Finding the Fourth Proportional to 116,970.70, 161,412.05 and 66,666.46

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Solution

The fourth proportional to 116,970.70, 161,412.05 and 66,666.46 is: 91,995.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,970.70 : 161,412.05 = 66,666.46 : x
  2. Step 2: Convert to fraction form
    116,970.70/161,412.05 = 66,666.46/x
  3. Step 3: Cross multiply
    116,970.70x = 161,412.05 × 66,666.46
  4. Step 4: Simplify right side
    116,970.70x = 10,760,769,974.84
  5. Step 5: Solve for x
    x = 10,760,769,974.84/116,970.70
  6. Step 6: Final answer
    x = 91,995.43

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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.