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Finding the Fourth Proportional to 120,136.48, 165,791.40 and 66,422.32

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Solution

The fourth proportional to 120,136.48, 165,791.40 and 66,422.32 is: 91,664.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,136.48 : 165,791.40 = 66,422.32 : x
  2. Step 2: Convert to fraction form
    120,136.48/165,791.40 = 66,422.32/x
  3. Step 3: Cross multiply
    120,136.48x = 165,791.40 × 66,422.32
  4. Step 4: Simplify right side
    120,136.48x = 11,012,249,424.05
  5. Step 5: Solve for x
    x = 11,012,249,424.05/120,136.48
  6. Step 6: Final answer
    x = 91,664.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.