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Finding the Fourth Proportional to 66,916.53, 100,379.40 and 19,532.01

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Solution

The fourth proportional to 66,916.53, 100,379.40 and 19,532.01 is: 29,299.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,916.53 : 100,379.40 = 19,532.01 : x
  2. Step 2: Convert to fraction form
    66,916.53/100,379.40 = 19,532.01/x
  3. Step 3: Cross multiply
    66,916.53x = 100,379.40 × 19,532.01
  4. Step 4: Simplify right side
    66,916.53x = 1,960,611,444.59
  5. Step 5: Solve for x
    x = 1,960,611,444.59/66,916.53
  6. Step 6: Final answer
    x = 29,299.36

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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.