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Finding the Fourth Proportional to 67,160.70, 100,708.72 and 39,087.05

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Solution

The fourth proportional to 67,160.70, 100,708.72 and 39,087.05 is: 58,611.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,160.70 : 100,708.72 = 39,087.05 : x
  2. Step 2: Convert to fraction form
    67,160.70/100,708.72 = 39,087.05/x
  3. Step 3: Cross multiply
    67,160.70x = 100,708.72 × 39,087.05
  4. Step 4: Simplify right side
    67,160.70x = 3,936,406,172.81
  5. Step 5: Solve for x
    x = 3,936,406,172.81/67,160.70
  6. Step 6: Final answer
    x = 58,611.75

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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.