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Finding the Fourth Proportional to 66,090.94, 99,136.71 and 19,343.81

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Solution

The fourth proportional to 66,090.94, 99,136.71 and 19,343.81 is: 29,015.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,090.94 : 99,136.71 = 19,343.81 : x
  2. Step 2: Convert to fraction form
    66,090.94/99,136.71 = 19,343.81/x
  3. Step 3: Cross multiply
    66,090.94x = 99,136.71 × 19,343.81
  4. Step 4: Simplify right side
    66,090.94x = 1,917,681,930.11
  5. Step 5: Solve for x
    x = 1,917,681,930.11/66,090.94
  6. Step 6: Final answer
    x = 29,015.81

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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.