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Finding the Fourth Proportional to 100,817.55, 151,274.93 and 71,171.55

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Solution

The fourth proportional to 100,817.55, 151,274.93 and 71,171.55 is: 106,791.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,817.55 : 151,274.93 = 71,171.55 : x
  2. Step 2: Convert to fraction form
    100,817.55/151,274.93 = 71,171.55/x
  3. Step 3: Cross multiply
    100,817.55x = 151,274.93 × 71,171.55
  4. Step 4: Simplify right side
    100,817.55x = 10,766,470,888.38
  5. Step 5: Solve for x
    x = 10,766,470,888.38/100,817.55
  6. Step 6: Final answer
    x = 106,791.63

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1.5x scale

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.