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Finding the Fourth Proportional to 107,939.70, 161,909.55 and 105,866.10

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Solution

The fourth proportional to 107,939.70, 161,909.55 and 105,866.10 is: 158,799.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,939.70 : 161,909.55 = 105,866.10 : x
  2. Step 2: Convert to fraction form
    107,939.70/161,909.55 = 105,866.10/x
  3. Step 3: Cross multiply
    107,939.70x = 161,909.55 × 105,866.10
  4. Step 4: Simplify right side
    107,939.70x = 17,140,732,611.26
  5. Step 5: Solve for x
    x = 17,140,732,611.26/107,939.70
  6. Step 6: Final answer
    x = 158,799.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.