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Finding the Fourth Proportional to 66,301.72, 99,453.01 and 18,916.71

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Solution

The fourth proportional to 66,301.72, 99,453.01 and 18,916.71 is: 28,375.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,301.72 : 99,453.01 = 18,916.71 : x
  2. Step 2: Convert to fraction form
    66,301.72/99,453.01 = 18,916.71/x
  3. Step 3: Cross multiply
    66,301.72x = 99,453.01 × 18,916.71
  4. Step 4: Simplify right side
    66,301.72x = 1,881,323,748.80
  5. Step 5: Solve for x
    x = 1,881,323,748.80/66,301.72
  6. Step 6: Final answer
    x = 28,375.19

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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.