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Finding the Fourth Proportional to 66,407.96, 99,619.24 and 33,136.40

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Solution

The fourth proportional to 66,407.96, 99,619.24 and 33,136.40 is: 49,708.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,407.96 : 99,619.24 = 33,136.40 : x
  2. Step 2: Convert to fraction form
    66,407.96/99,619.24 = 33,136.40/x
  3. Step 3: Cross multiply
    66,407.96x = 99,619.24 × 33,136.40
  4. Step 4: Simplify right side
    66,407.96x = 3,301,022,984.34
  5. Step 5: Solve for x
    x = 3,301,022,984.34/66,407.96
  6. Step 6: Final answer
    x = 49,708.24

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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.