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Finding the Fourth Proportional to 66,611.81, 99,988.83 and 28,679.87

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Solution

The fourth proportional to 66,611.81, 99,988.83 and 28,679.87 is: 43,050.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,611.81 : 99,988.83 = 28,679.87 : x
  2. Step 2: Convert to fraction form
    66,611.81/99,988.83 = 28,679.87/x
  3. Step 3: Cross multiply
    66,611.81x = 99,988.83 × 28,679.87
  4. Step 4: Simplify right side
    66,611.81x = 2,867,666,145.91
  5. Step 5: Solve for x
    x = 2,867,666,145.91/66,611.81
  6. Step 6: Final answer
    x = 43,050.42

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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.